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rpm8300

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About rpm8300

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    Finally read the FAQs

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    Arlington, VA
  • Real Name
    Thomas Koh

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  1. rpm8300

    Czechmate.... WTF why not

    Hey guys - I just got my CZ up and running and I can post pics if requested. After running multiple 2011 9mm major guns, and I also briefly owned a Tanfo GT 9mm, I will say I like the CZ a lot. "Better" is subjective but here are some of my observations: -Reliability - right out of the box, even with the stock Cmore mount, the gun is 100%. Ive since added the CZC basepads which gives 29 for the big stick - stil 100%. Right out of the box, you don't really need to tweak it to get the ejection right, or the trigger right, it feels great. -Very accurate - a buddy who shoots a CZ locally said he runs Blues - I was skeptical but with 115 Blues and 124 Blues, the gun is very accurate. This is with both WAC and Sil. If you want to run Blues out of a major gun, this will work right out of the box. Ive had mixed success with accuracy of Blues out of 2011s at major PF. Since it doesnt have popple holes, you can get away with less powder, esp if you run Blues. I can get the same PF with .2-.4 grains less of powder depending on the load. -Value - I bought mine new for just under 3k - that is a new 9mm open gun with two barrels, slide for limited minor, new Cmore, mount, lots of spare parts, etc. -CZC has a multioptic mount which is money - it comes with a bunch of different holes and plugs so you can throw pretty much any optic on the same mount. Ive had both a DPP and RTS2 on mine. -One downside is the chamber - you'll need to ream it or just run short bullets - 1.11 with blues for me. Reaming is no big deal ,but with less powder, its not a big deal running 1.11. -Another downside is weight - I like a really heavy open gun, and this is lighter than my steel grip 2011 with super heavy magwell and full length dust cover. Long story short, I like it - I think it shoots as flat and as nice as a 2011 CK fully set up with popple holes and a good comp. Tom
  2. rpm8300

    holosun 510C is huge

    I put a 510C on my MPX for PCC and immediately after shooting it thought - how good would it be if you could mount this on a pistol. If anyone has run it, can you share the offset at 3m with a 18 or 20m zero - I'm going to guess its at least 2" or so. Thanks, Tom
  3. rpm8300

    Hodgdon Titegroup vs VV N320 for 9mm

    N320 meters the same as TG in my 650 - in fact very few powders do not - 700x and Clays are what comes to mind. N320 is good but I'm a little country as opposed to a little rock and roll - I like N310. Plenty of threads about N310 with 147 and heavier bullets. If N320 is too much, you can generally find Accurate #2 cheaper - its very similar but not quite as good as N320. Yes, N320 costs a lot but just by the virtue of being here on Enos and loading your own bullets, you obviously care about the finer parts of the sport - go ahead and stretch those T-rex arms waaaay out and reach deeeep in to those pockets ? Tom
  4. Hey folks - got my S2 milled for a DPP by J & L Gunsmithing - they did a great job and it was a quick turnaround. I actually also tried a Sig R1 - holes line up, required minor adjustments - and there are pros and cons. Sig R1 is wider and significantly lighter - lighter than the iron sights it replaces lol. But reliability is WAY too low - went down for me at Area 8 last year - buttons broke, got a new one from Sig, that broke, called it a day. DPP is the best option for pretty much anything red dot wise - only better is a Holosun for PCC and Slideride for open or PCC if applicable - for microdots, get a DPP and call it a day.
  5. rpm8300

    MPX Maintenance Schedule

    Anyone try using AR15 extractor springs?
  6. rpm8300

    Sig MPX problems

    For my MPX, I had similar gas/ejection issues in stock form. I like 147s and wanted to keep the load the same for pistol and rifle so I ended up on this: 147 Plated (doesnt really matter which ones but I've lately used Everglades RN) 3.3 gn N320 1.14 To get this to run reliably: -Gas port enlargement (for Gen2) by ILWT -'Open' gas plug by ILWT -Make sure your mag springs have enough tension - I had issues with the Taran basepads so I only use Taylor Freelance -Make sure the gas port is clean enough to allow the tappet to move freely without too* much force. I highlight this because the tappet will always need some resistance, it shouldnt just slide right in and out. Verdict is still out but my MPX Gen 2 reminds me a lot of certain open guns - it takes some work to get it dialed in, once you do that, its just a matter of maintenance and checks. Hope this helps. Tom
  7. rpm8300

    MPX Maintenance Schedule

    This is very good info - I've tried a bunch of other solvents and solutions and none have created that kind of breakup after 30m. I'll try it and advise.
  8. rpm8300

    Thinking about a 2011/1911 from a Glock

    Hey partner - just to provide more perspectives - I started USPSA with a G34 in 9mm in production. Its a great platform to start with and many people (Shane Coley) can take the platform to the highest levels of performance. That being said, I went to and prefer 1911/2011 platforms over Glocks. The biggest things for me are the natural point of aim, the trigger, and the accuracy. Point of Aim - grip angle is obviously more extreme w a Glock - this is intentional based on how Glock wants your arms and wrists as the sights are lined up. For me, the 1911 2011 grip angle is perfect and very natural. Trigger - pages and pages have been written on this - I have Glock production legal triggers well under 3lbs and with a pretty clean break for striker fired - it will never be as clean as a tuned 1911 break. Weight isn't as big of a deal as break - I like my 1911/2011 trigger break around 2.25 lbs but clean. The best striker fired trigger I have seen is an M&P - its very clean. Accuracy - I can't speak to 40 but in 9, my G34s have been a little finicky with different loads an bullets. Not to say all 1911/2011 are super accurate, but my Glocks didn't like heavier loads with faster powder, i.e. 2-3" groups at 20 yards from a rest. I have tried different barrels and different loads and I have seen Glocks shoot 1" groups, but its just a little more particular with the ammo. Hope this helps, Tom
  9. Hey everyone - after learning some lessons the hard way and talking to some folks who have a lot more time on an MPX than I do, I thought I'd start a maintenance thread. I'll start by saying I like the MPX a lot and its a great PCC platform. I will also say that it take a good bit of regular maintenance and part swap outs if you want to run it 100%. I'm running a Gen 2 MPX with a floating firing pin, OEM gas port. I like running 147 plated with N320 or Accurate #2. -Tappet and gas plug cleaning - every 2k rounds -Tappet and gas plug rings - as needed but no more than 5k (gas plug isn't as important but prob worth doing at the same time) -Firing Pin Spring 3k -Extractor Spring and Insert 3k -Firing Pin 5k -Recoil Springs 10k depending on if you're running OEM or lightening - I like the -13% reduced by ILWT - don't want to go any lighter -Trigger springs 10k depending on your trigger This is probably a very very conservative schedule so I'll offer it up to the group for suggestions. Tom
  10. rpm8300

    MPX Gen 2 Load Data

    Hey folks - I've been running a MPX Gen 2 in PCC for a couple months and I thought I'd share some load data. The barrel is the stock 16" and I have not modified the gas port - I'll prob end up changing both the barrel and handguard but for now I'm running stock stuff. This includes the stock recoil springs although I have some lighter ones from In Lead We Trust I may try with my 158 and 165 grain really heavy bullets - these are just going to be silly soft... After trying a few different bullets and powders, here are my top match loads: 147 Everglades RN Plated 3.2 gn of N320 1.15 OAL 902 fps / 132 PF Groups 0.75" at 20 yds - runs 100% 147 Everglades RN Plated 3.1 gn of Titegroup 1.15 OAL 936 fps / 137 PF Groups 0.75" at 20 yds - runs 100% I recently got some of the 150 gr 9mm SYNTECH bullets to see how good they would be for an off the shelf USPSA minor 9mm load - long story short, they are OK but make sure your gun is good with flat points, and their coating. 150 gn SYNTECH 1002 fps / 150 PF Groups 1.25" at 20 yds - runs 100% The SYNTECH are too hot for this PCC but may work well out of some pistols for production/carry optics. Ive figured out some other things with the MPX that have already been well documents on Enos - but feel free to message me with any follow on questions. Tom
  11. rpm8300

    M&P Full Carry Optics Setup

    I did this on one of my DPPs and I think it may have messed it up. I was careful about it and used a dremel slowly, but that particular DPP had to be sent back to Leupold. They replaced the guts and its fine now. After I took off the material, the autoshut off sensor wasn't working - the optic would shut off at 5m regardless of movement. FYI.
  12. rpm8300

    158gn 38/.357 bullets for 9mm Guns

    Hey Al - do you find that the .356 BBIs shoot any differently than a .357? The BBIs I would think would be more forgiving on diameter due to the coating. Thanks, Tom
  13. rpm8300

    158gn 38/.357 bullets for 9mm Guns

    The OEM and S3F Barrels in my G34 will not shoot these 165 grain 9mm accurately - I can get about 3" groups at 20 yards. Even with this, I didnt have tumbling issues as you describe. With other guns, i.e. Apex Barrel and M&P, it is extremely accurate with no keyholeing whatsoever.
  14. rpm8300

    158gn 38/.357 bullets for 9mm Guns

    For what its worth, Ive run a few thousand of these 158, hundreds of 160 Bayous, and a TON of 165 Xtremes with no issues. I've loaded them as short at 1.12 and as long as 1.17 - no issues - cases and primers didnt show any signs of overpressure. This includes lots of 158s and 165s out of a G34, OEM and S3F barrel, Stock 2, and M&P. Ive had one case separation with a 165gn 9mm in a Sig P320 X5 but I'm certain that was a case that was compromised already.
  15. rpm8300

    M&P Full Carry Optics Setup

    I can measure it but it is probably less than 1/8 of an inch. I put it in my vice and used various files to evenly take material away. It took about an hour to get it just right. Definitely not rocket science, just takes time and patience.
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