MikeRush
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Posts posted by MikeRush
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2 hours ago, motosapiens said:
Just to play the devil's advocate, I'm not sure that just because a stage had an effect on the final results that means it's a bad stage or too hard or whatever. It's kind of a judgement call as to whether there is too much effect from a single stage.
I don't think any reasonable person would say Nils' victory was 'artificial', or that he didn't earn it by outshooting everyone else (as usual). It looks from the results you posted that perhaps Bob and Jacob need a little more practice on certain skills that the other 8 guys in the top 10 were more consistent at.
To OP regarding "artificial": That Nils guy must have been really lucky at the 2013 Limited and L10 nationals, the 2014 Limited nationals and World Shoot, the 2015 Limited 10 Nationals, and the 2016 Limited nationals. That, or each of those matches had a crappy stage that always works in his favor. 2015 Production Nats must have had good stages because Bob placed ahead of Nils.
Looking at Stage 9, average stage percentage by class, rounded:
GM 47%
M 32%
A 20%
B 18%
C 13%
D 1%
OP, I would base your argument there, rather than getting into individual shooters.
I agree that stages shouldn't be so hard that the average GM finish is under 50%. I disagree with "shooter A shot 1 penalty and shooter B shot 3 on this stage. Shooter A won the match so its a bad stage".
To paraphrase a great Baja racer, "Any dummy can go out there and mash the *thumb rest [generic]*. The trick is knowing when to lift."
ETA: didn't included the quoted quote so added text for clarity. Also, that should be the part of a car you press down for loud noises, not thumb rest generic.
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1 hour ago, Flatland Shooter said:
Do you torque the barrel nut to the same specs as 5.56 or less?
Thanks.
I torque them to same as 5.56. I figure by using the loctite to bond the barrel to the upper I am taking away from the extra impact imparted to the nut by the blowback system. I believe JP uses the red on factory builds, and that Alexander Arms uses thread locker on their exotic uppers.
I have heard green is better for this purpose but I have found red to be adequate. I have bedded .223s this way as well when I know I am happy with the barrel/upper combo.
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Grease the receiver/barrel nut threads to prevent galling and corrosion.
Typically you don't need to do anything to the interface between the barrel itself and the upper. On PCCs I am now using red loctite between barrel and upper, then grease on handguard/barrel nut threads. It takes a propane torch and dowel to get barrel out of the receiver, but it prevents the blowback bolt from hammering the barrel enough to cause the barrel nut to back off.
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Open high hit factors.
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2 hours ago, six-gun shooter said:
Sounds like a comp doesn't give much benefit on a 16" barrel, but would it be worthwhile on an SBR? My 8.5" barrel just arrived. I'm eyeing the JP.
If you look at a pressure curve for 9mm that gives you an idea of what a comp has to work with at different barrel lengths. I don't know how much it woild do at 8.5", but would likely be more than it does at 16".
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Affirmative. Just like any other centerfire AR.
Congratulations on getting set up!
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You are not crazy! I've gone as low as a 3 oz buffer with my CMMG bolt and found less dot movement and quicker splits. It did exacerbate a feeding issue I had but I ordered a 4.6 oz H2 buffer for it a while back, and might even swap out one tungsten weight for a steel one to get to "H" 3.8 oz weight. That may be a good place to be for true minor loads.
I will say that WWB (chronos over 150 in my PCC) was downright nasty with the standard 3 oz carbine buffer. Lots of noise and gas from the ejection port.
Have you experimented with bolt stroke at the different weights? I think I like the light buffer with full stroke best, but shortening the stroke does seem to speed things up a bit at the expense of some additional harshness as the buffer bottoms out.
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The spacers/quarters are typically used to prevent damage to the bolt catch, if you have a functional LRBHO. In that case, the consensus is you want the bolt to travel just barely rearward of the point where you can engage the bolt stop, to prevent the bolt/buffer from having room to gain significant speed before hitting the catch in forward travel.
I will want a functional LRBHO next year, but I actually prefer the impulse of a lighter buffer with no spacer for increased travel. Quarters are cheap and you can tune to suit your personal preference. IIRC the New Frontier doesn't have LRBHO built into the lower.
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The primary role of the spacer/quarters is to reduce bolt travel and save bolt catches. Quarters add a slight amount of preload to the spring but it isn't much.
I am using a Wolff XP spring. I don't know if a rifle spring would reach coil bind and limit travel or not, but if you are after a stiffer spring weight there are plenty of manufacturers out there who make a stiffer spring.
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If you primarily want to add just a bit of weight and have a Keymod handguard V7 manfactures a slim handguard weight. It uses 3 keymod attachments and weighs a little under 5 oz, which is similar to the weight of a flashlight.
You could also run a 1" flashlight mount, or 1" scope rings with some round stock. That would let you tune the weight and shape to suit your preference.
A flashlight would be most tacticool. I might add one at some point, but it would be functional as the PCC pulls double duty for me.
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I am using the SIG Romeo3 with the optional QD riser. I like the auto on/off, dot brightness and field of view.
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On 8/29/2016 at 1:09 PM, Alaskapopo said:
No actually the opposite. Generally PCC's are easier to shoot.
Pat
Easier to shoot? Sure.
Easier to load, reload, clear malfunctions, run with, shoot weak hand, work around ports, barricades, and other practical shooting challenges? Depends on the stage.
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On 7/28/2016 at 3:35 PM, freshrider said:
The 16" will be easier, since the 14.5" has a pinned/welded comp.
On a blowback gun it shouldn't be any different. The issue with pinned/welded brakes on standard ARs isn't the barrel nut or handguard, it is the gas block. Typically the barrel nut will not fit over the gas block or front sight base, so the muzzle device traps the gas block/FSB and that traps the barrel nut.
No gas block on blowback gun like the GMR 13, so no problem.
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I am currently running a CMMG dedicated lower with converted Uzi mags. I like the straight insertion, capacity, and options with these mags.
I've found the "beer can" grip, or for me the chocolate milk grip, seems to work better than grabbing from the basepad like a pistol mag. I have had serious issues seating mags that are full, or near full, on a closed bolt. I am going to lower the shelf height on the catch a bit to see if that helps.
I played with the QC10 GSF lower and think I might be picking one up as well to supplement or replace my current setup. The magwell is nicely flared and the plastic, tapered Glock mag seems to be a bit more forgiving. It is a wierd angle, but the mags seem to seat well.
As I will be shooting "PCC 10" next year I think seating 10 round Production mags by grabbing from the basepad might be more reliable and faster. Time will tell...
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It depends on the stages and who shows up. Making PCC minor only has a lot to do with that.
I was about a percent away from HOA at the last match I shot and I am admittedly weak and untrained with a carbine. I have about 500 rounds through my PCC.
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Third match in PCC. I have a long way to go but I am enjoying every minute of it!
I need to see if I can convince the local range to let me practice on the pistol range rather than the rifle range so I can work with steel from 10-50 yards. We will see!
Classifier was Fluffy's Revenge 2- wound up with an 11.07 HF which should be good for an A class percentage.
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I think this approach to springs is brilliant:
https://www.ar15.com/archive/topic.html?b=3&f=15&t=586506
Also, my milsurp Uzi mags are incredibly rough. I went ahead and polished all the bearing surfaces on the follower on one mag and it makes a huge difference in how easy the mags load and unload. If you reduce the resistance in the tube you might get away with a stock or near stock spring. In the long run I might get the mag bodies hardchromed and followers coated with a slick finish.
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Thanks! Printing a +8 right now. Should get to test it tonight. The Asc spring seems to have more tension than the Uzi spring. To be fair, my Uzi mags were scratch and dent specials that might have been used in the 6 day war. I missed that thread posted above somehow. I wonder if there is an extended spring from another application that would work in a really long extension?
Wolff has a +5% Uzi spring. Argentine FMK3 40 round mag springs might work but I haven't seen them for sale separately. There are 10.5 inch springs available online but I haven't compared that to the free length of the Uzi springs.
A member here posted a DIY weld up of 2 Uzi mags on another site where he soldered 2 uzi springs together to get the length he needed.
I think when you get long enough that the follower drops into the basepad you may have issues at the transition. Fortunately the follower is really long so you wind up with some leeway there. I am interested to hear how this turns out!
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I've wondered if any one made a threaded steel cone. But now does that affect your weight savings? Who makes such a thing? Thanks JeffYou will need a steel cone and then a Ti comp. ti is not a good bearing surface. It will typically add about 1/2" vs a steel cone comp.
If you really want light Glenn at LSI can do a Briley spherical bushing on a bushing barrel with a comp.
Otherwise you could go with a bull barrel and have it tapered and or fluted to reduce weight. I don't like the idea of 2 sets of threads, personally... and the weight would be close to a steel cone setup.
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That looks great! I have been using the TTI Glock +3/4 on mine but a functional +6 seems really useful!
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I am running the ALG ACT with the provided springs in my blowback and liking it quite a bit.
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Actually still works, but it is longer than it needs to be to get more capacity. I started with a purple +6 for proof of concept, but I didn't get any more capacity than the +4 pads. The +4s aren't angled because they are designed to fit the box rather than the gauge.
The angle of the glock mag may prevent the use of TTI base pads with colt mags
The +4 meant lightly filing the bottom of the tube. Factory pad still works on it, just taking a bit of height off where the regular basepad stops.
I shot with the +4 today. Comfortable, and dropped well, but for now I am more consistent with finding the magwell using the beer can grip.
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After looking far and wide for someone who makes an Uzi/Colt extension I got a tip from Brian Nelson.
TTI Glock +3/4 basepads fit the Uzi and Colt style mags. There is a bit of front to back play, but that isn't an issue once loaded due to the design of the follower.
I haven't tried the Metalform mags yet but it takes just a bit of filing to the bottom of the Uzi mag tube to fit.
Gives me 36 reloadable. We will see how well they hold up to drops.
Interesting. Let us know how it worked out.
It would be super easy for someone to CNC a Colt/Uzi specific pad. I think you could probably get a depth allowing +6 or maybe +8 capacity to work without having to deal with the follower getting stuck at the basepad/tube transition.
I will shoot a few hundred rounds in practice tomorrow, and then shoot my first match in PCC next Saturday. I will probably shy away from dropping the extended mag (shouldn't need to drop a 36 round mag) but potentially some of the +0 Glock pads might work for mags you are dropping.
I might have to try that on some 20 or 25 round mags... we will see!
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After looking far and wide for someone who makes an Uzi/Colt extension I got a tip from Brian Nelson.
TTI Glock +3/4 basepads fit the Uzi and Colt style mags. There is a bit of front to back play, but that isn't an issue once loaded due to the design of the follower.
I haven't tried the Metalform mags yet but it takes just a bit of filing to the bottom of the Uzi mag tube to fit.
Gives me 36 reloadable. We will see how well they hold up to drops.
USPSA Nationals Shooting Challenge Difficulty Poll
in USPSA/IPSC Shooting
Posted
I was following you up to this point. Call me delusional then. You mean the guy who shot a very difficult stage better than his rival beat him in the overall? Sounds artificial to me.
I agree with you in theory that we don't need virginia count, strong hand only 25 yard partials to determine who the best practical shooter is. I think it is dumb, personally. Where I disagree is that dumb=unfair. Maybe that stage didn't belong there, but it still was fair. The GMs on average finished above the Ms, who finished above the As. Its not like Bobby B class snuck up and stole the stage win because he happened to land 2 on a 50 yard head box only virginia count swinger that activates randomly based on planetary alignment.
TLDR version:
Hard stages aren't unfair or artificial because they are hard. They might be dumb, but they aren't inherently unfair.