tripletapjake
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Posts posted by tripletapjake
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Ok, here it is.
My 18" Light contour, LRP-07 came in at just a hair over 8lb with a 15" handguard, ACE stock and captured spring system. Pretty light. Balance is good and at home I have a photo of the rifle balanced on the mag. If you run a mid gas, you will want an adjustable gas block. With rifle length gas you could get away without it. Personally, I would still run an adjustable but that's me. I like my 18" barrel and feel that it hits the sweet spot for length. I can run irons if I want to, get good velocity and the rifle is still short enough and light enough for fast courses. Mid gas, rifle gas, didn't matter much to me. What I wanted was a quality build. It handles well and muzzle manners are amongst the best of the heavy rifles I have shot. Felt recoil is comparable to a basic 16" 223 carbine with A2 birdcage. I currently have two established loads. My long range load is a 155gr SMK and 43gr IMR 8208, 2.775" oal, which I've printed sub MOA at 400yds. 2675fps. I've run this load out to 600yds in competition with excellent results. My short range load is 125gr speer TNT and 44.5gr IMR 8208, 2.700" oal, which I've printed sub MOA at 200yds and have shot out to 500yds in competition with excellent results. 2835 fps. I really like both of these loads because they are both effective and both are close enough to my 223BDC to get away with running my Meopta ZD 1-4x. The speer 125 load has noticably less felt recoil than the 155s and seems to be very accurate and I will more than than likely be running that load at the Noveski match in April. It is also fairly cost effective at about $.37 per round.
Comps are a whole other can of worms, which I've written about in other threads. There are very few comps on the competition market which were designed for 308. Nearly all of them are 223 comps, adapted for 308 or 30cal bolt gun comps. The small JP comp simply isn't big enough to tame the 308 to the level I would like it to. I tried the Titan, didn't like it. I tried a Miculek, didn't like it. I tried a Surefire, didn't like it. I tried a Rolling Thunder and liked it... with some reservations. So I tuned in the Thunder and ran that for a while. Until I hit the 1000rd mark and the pressure chamber was so loaded up with carbon that my accuracy went to poop. I sold one of my Thunders and gave the other to a buddy. That got me to thinking about comp designs and efficiency. I went back to the Miculek and started working with it to see if I could get it to work as well as the Thunder without the negatives. I was mostly successfull. By drilling out the firewall, step boring the baffles and drilling a few jet holes, I was able to get the Miculek to work almost as well as a Thunder while being shorter, lighter and having none of the carbon build up problems. I felt that a dedicated semi auto, 308 comp could be designed and started down that road. I came up with my own design utilizing the best features from lots of different comps and adding a couple of new ideas as well. Start up cost to get a comp prototyped and then a production run is outside my means at this time, but while digging around on the internet one day I came across a bolt gun comp which was very close to what I designed. It could be a little better, but close enough to give it a try. It was good... I mean really good, but being designed for bolt guns it wasn't quite right. I made a few mods of my own and was able to get it really dialed in. So I can in fact tell you what my favorite comp is, but it doesn't technically exist except for the prototype on the end of my barrel. I called the maker and he agreed to make me a small production run, which I should have well before the start of next season. Sorry for being a litte evasive, but I'm not ready to show it off yet. I'm doing a small run because competitors are fickle. I really like it, but that doesn't mean you will. There is no, one best comp and this one I'm having made, won't float everyone's boat. That's cool. I'm not ready to give up my day job anyways.
I would be interested in giving that prototype comp a try if you end up with an extra one.... just PM me if you think that is possible.
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are you running H335 Jake. I have a new LRP-07 with the same optic that I am about to start loading for soon.
Actually his dad right now... Jake and I share the account until he gets a bit older. Yep...49 grains under the 110 VMAX. Chris Hodgdon turned me on to 8208 XBR (shortage of H335 right now) and I will be working up some loads in the next couple of weeks. I have also used 46.5-47.3 grains of TAC which worked out really well but it is also a hot load. Definitely start slow and work up at these pressures or it can get away from you really quickly.
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No offense to the other guns you listed as they are good guns but the JP is heads and shoulders above the other guns. If you can wait, it will make a world of difference.
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I have an 18" JP LRP-07 .308 for Heavy Metal. I have the full length hand guard, Magpul UBR stock, JP Silent capture spring set up and I have a Leupold Mark 6 in a LaRue SPR 1.5 mount. With an empty PMAG inserted, my gun is exactly 11 pounds. Don't be shocked by that number, it is only slightly heavier than my friends DPMS 16" gun without optics or mag. The JP is also really well balanced. With a forward support hand grip, you can really drive the gun.
Recoil with the 110 VMAX @ 3010 fps avg is extremely light for a 308 and it feel more like a 223 with a flash hider. The 110 round is hot and really makes the stock comp shine. Most other loads (150, 155, 168, 175) are still very mild compared to any other 308 I have shot.
Accuracy is incredible with everything I have fired through it. With the 110 load, you are the limiting factor out to 300. If you do your part, all rounds will touch at 100 for a 5 shot group.
I can't say enough good things about the gun. It makes you want get rid of your 223.
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This may be an entirely different point of view but....I have found that the "cheapest" mags are the Wilson Combat or the Chip McCormick mags....they cost more but when you go to a match and the less expensive mags jam....you match goes down the tubes and all of the cost that goes into practice and getting to the match goes right down with it....so the more expensive but perfectly reliable mags seem to cost me much less in the long run.
If you are betting your life on the mags....it becomes even more important.
Just my two cents worth.
That's what I call ROI. A hard concept for alot of people to accept. I won't buy any cheap gear if their is a higher possibility that the gear will fail rendering all money spent up to that point useless.
My point exactly....thanks
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The only reason I was considering maybe a 260 was possibly loading up some light bullets so I could use the gun as a varmint rifle... I'm not sure if the twist is setup to handle the lighter bullets though... I appreciate the input
I have an LRP-07 and for use as a varmint rifle.... the 110 vmax 308 is very flat shooting (260 and Credmor are better), accurate and extremely low recoil. It is my 3Gun load. 110 vmax under 49 grains of H335 is good for about 3000 fps out of my 18". I get ~ .5-.65 MOA from that load. Nothing but good things to say about the gun and JP in general!
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Will be there!
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Trapr did my SuperNova.... I can't say enough good things about his work!!!!!!
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Fair enough...although I can attest to the effectiveness of 3" loads on duck and geese
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The EZ kit is a great trigger kit.... you will like it and it is really easy to install.... short of having a qualified and experienced person do a very refined trigger install.... you will probably have one of the best triggers you can install....chances are, you would not notice the difference between the EZ kit and the original (properly installed) when doing any real shooting drills.
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I was hoping the custom shop was super custom. I would love something like the Nightforce NP-22 reticle but with holdovers. I would love to design my over reticle and have them make it for me. So I guess my choices are SPR or stick with what I have... sigh.
The problem with that is that Leupold needs to hold the license for those reticles which they may or may not.....and the specific model of scope has to be able to be modified.....if you have both of those factors...you probably can get what you want....but putting someone's reticle in your scope without a license for the reticle is a the fast way to a lawsuit....
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There is one easy way to deal with this....only shoot 2 3/4 and 3" shells....for 3 Gun that is all you need. OK so I have seen someone shoot a 3 1/2" load at an MGM Spinner but it was just silly and he didn't spin in a single round as he predicted.... So the rest of it is just academic at this point.
Just my two cents and not trying to offend anyone....
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I like the 24"....when you start getting longer than that...the extended mag tube hold a lot of rounds way out on the end of the gun and it starts to get a bit heavy when you are loading....in some of the tighter stages where there are obstacles... I can see where a 26 or 28 might be hard to maneuver with and transition quickly....but that is just my opinion.
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Another great product from Carbon Arms......and if they have an award for the prettiest mag tube extension.... I think they win hands down.
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Definitely Super Nova....you can not underestimate how much faster you can load with a 3.5" receiver and the lifter gate staying up and out of the way...the stock is adjustable and you can mod the loading and ejection port (although I had Trapr from RedNeck Tactical do mine) easily as they are polymer. I couldn't be happier.....but honestly.... it received the "best in class" seal of approval from Pat Kelly....there isn't much else to say after that.... Pat is the King of HM!
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Mark is right....I am not sure why the 3" chamber....maybe for overall length purposes....but be glad they put the 3.5" receiver with the 3" chamber....the 3.5" receiver seemed to load much easier for me. I think the extra room makes stuffing shells in the gun a bit faster. Now I am no "PRO" at loading but it and my other 3.5" receiver guns do load faster for me.
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Our light contour barrel was a cheap barrel not a JP. JP's barrels are stainless, cryo treated, air gauged and button rifled if I remember correctly. All of those factors lead to accuracy. The cheap barrel in an old gun was none of those things and it did shift when it heated up from rapid fire strings..... there is ABSOLUTELY NO COMPARISON between cheap barrels and JP barrels. The barrel is the heart of the gun....spend your money there, then the trigger, then the full float tube....then on reliable components (which you have in the Low mass group and buffer)....and you will have a fantastic gun....the barrel is the last place to cut corners! The heat sink just makes the barrel perform that much better.
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Be happy you invested now.... a few months from now you might not be able to.....crying now will produce happiness and laughter later... ;~)
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Wow....every time I think I am getting closer to being fast someone comes out and does something like that!!! Great job....
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50.... the 7.62 reticle is set up for a 50 yard zero (it is pretty close at 200) with 175 SMKs....not sure what the 556 reticle is set up for...
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I chose the Mark 6.... they are both supposed to be great scopes but I wanted the FFP reticle and the Mark 6 is lighter and shorter....once you see the glass in the Mark 6 you will realize how far Leupold has come from the Mark 4 (a good piece of glass as well)...
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You simply can not go wrong with a JP... they provide a superior product and back it with world class customer service. The accuracy of the rifle will truly amaze you....feed it good ammo and get a good zero and you will be amazed at how easier it is to hit your targets.
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My son's 1.5-5 Mark 4 has a SFP CMR2 reticle and he loves it....he shoots open so it is fast enough to keep up to the Top guys and it is fine enough of an aimpoint to get after the small long range targets....
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I'd like to see someone in Open do the same drill with Arms Tec sticks for comparison.
Open with mag, Robert Wright,load 12 in 1.42 sec., Me 2.17 sec.
Doug
And that is why I shoot open with an R&R......Mr. Garcia's time is wicked fast!
77 SMK & 8208 XBR results
in Rifle/Shotgun
Posted · Edited by tripletapjake
So I worked up a new 3Gun load with a 77 SMK and IMR 8208 XBR for a 16" JP CTR-02. The velocity was not as high as I was hoping but the results were amazing. The load is shooting less than 1 MOA, it has an extremely light recoil pulse with zero pressure signs and incredible consistency.
I am sure my group could have been much better with a bit more magnification and a more precise reticle. Most of the group size was aiming error as the Leupold TMR-D reticle in the Mark 6 took up the entire 1" diamond target at 100 yards.
Here is the load:
77 SMK
23.0 grains of IMR 8208 XBR
LC Case
CCI Small Rifle Primer
COAL: 2.255"
Barely kissed the case mouth with a Lee FCD
Here is how it turned out with the chrono with a 20 shot sample out of the 16" CTR-02:
Average: 2534 fps
High: 2553 fps
Low: 2521 fps
ES: 32 fps
SD: Only 9 !
8208 XBR is an extremely temperature stable powder so I should have very little shift from match to match..... regardless of where the match is located.
With a 50 yard zero, the bullet drop is still relatively flat and corresponds with the TMR-D reticle pretty closely (approximate values):
50 zero
100 + .3 mil
200 - .18 mil
250 - .54 mil
300 - .95 mil
350 - 1.4 mil
400 - 1.9 mil
450 - 2.4 mil
500 - 2.9 mil
For all intensive purposes, this should be a good 3Gun load.