MemphisMechanic

Gotcha. I haven’t had the chance to work OAL & charge wieght up to find a load optimized for accuracy. I might very well end up at 1.110 too, once I do.

In addition to what @Hammer002 said, the bolt speed and mass of the 9mm BCG is enough to beat most 5.56-marketed triggers to death within a few hundred to few thousand of rounds.

If you want, Rick, I have a reamer that lets me cut a PCC barrel without pulling it out of the upper. My CMMG takes everything out to 1.150 now - it was even shorter than yours. I JB Weld a dummy round onto the end of a bamboo shish-ke-bob skewer so I can plunk & spin test it when I’m cutting it.

Please god let you have fixed this problem. Thanks for digging into it.

The forum is still doing this on an iPhone in safari and it is freaking infuriating. I DO NOT mind Brian making some money by the links getting added. But each time it does the cursor jumps to the front of the created hyperlink. It is insanely frustrating to keep moving it forward where it should have gone.

I found the ultimate remedy; my 1050. (shellplate doesn’t move up and down, so all primer catcher mods have the same advantage.)

@ExStreetWalker that design is slick! The only problem I had with most “through the table” designs was the tube kinking as the shellplate came down. This solves that by making the tubing static. Brillaint idea.

Excellent

I would post the dates you’ll be in the US, too. It could help. If you were headed anywhere near me I’d happily show you around our local match... but the drive to Miami is about 12-14 hours for me!

Figures. Anyone got the new lightweight who is seeing good accuracy out of theirs?

There are three guys I know, two in Memphis and one down near Jackson MS... who have shipped (or are waiting on instructions to ship) theirs back to MBX. Two of then won’t group better than 5-6” at 25 yards. The third of them is shooting around 3” using various brands of 115/124 factory ammo. That’s pretty atrocious for a rifle. Hopefully MBX takes good care of them when it comes to refund/warranty/exchange. (Another local has their mediumweight, and his gun will pretty much stay inside of a postage stamp when shot at 25yds.)

A 124 at around 140pf was a pretty popular choice with the top 10 PCC shooters in this year’s nationals. I like the faster cyling; I think the gun is slightly more reliable, and in my gun, it shoots flatter than with 147s. I’m going to play with a 115 next. If it’s accurate and flat I’ll have a winner. How soft the recoil feels doesn’t matter. I just want it to group under an inch at 25yd, and for the dot to stay flat.

Most of that buildup problem come from your bullet choice. Coated or FMJ will always leave gunk in the comp that is packed in like concrete, and a pain to clean. I run a plated everglades bullet and my gun loves them. I also think you should drop bullet weight. Here’s why: Loading for the same power factor, you are running (roughly) half a grain more charge weight. A super light 124gr load is going to be around 3.2-3.4 grains, and that will cause titegroup to burn more consistently and more cleanly.

This. Competitive PCC guys are perhaps 0.5% of magazine sales. So we get factory mags with extensions made by companies who specalize in this market.

What was the issue? 130pf production-gun loads make around 148-145pf in a PCC and that seems to be the sweet spot for them when it comes to accuracy and reliablity. What did you have problems with?

95% of the gun’s behavior is the buffer/spring and ammunition being tuned to each other. The comp only offers that last little kiss to stabilize the dot. Mine doesn’t do a lot, but I can tell the subtle little difference.

How I switch shoulders from strong to weak: 1. Offhand moves back to front of magwell. 2. Strong hand moves from pistol grip to out on handguard. 3. Weak hand goes to fire control. Where the stock is moved to the opposite shoulder varies depending on how you’re moving uprange/downrange/sideways or if you’re static. Many people move the strong hand forward to the magwell first. I find that I can be more agressive snapping the offhand backward and gripping the magwell on the trip backward, then accomplish the rest on the move. It’s personal preference.

I got an email from a Prince in Iran who vouched for them. He’s sending me $10,000 via money order right now.

The wave spring will short stroke the gun so that: 1) it will lock open reliably for the last shot. 2) you can lock it open. Manually. With a hard wrench of the handle. My 118lb girlfriend can’t manage it. It’s really tight. This setup won’t soften the recoil. What it *WILL* do is make the gun shoot hilariously flatly. Pull the trigger and the dot barely bucks at all. The 308 buffer is stock length. It weighs 5.0oz versus the carbine 3.8oz. A heavier one might soften and flatten things out more. I haven’t tried one. The gun will run on factory ammo reliably. Reloads will just be softer, shoot flatter, and more accurate once you tune them to your particular gun.

Wave spring. A single quarter used as a spacer. Sprinco red spring. Kynshot 5oz hydraulic .308 buffer. Don’t bother. You can buy my used one if you want to waste your money too.

You can beat that by a good margin by getting the Enos discount activated on a login over at Shooters Connection, and ordering through them.

PCC is... long open. Way too many guys are doing the “sprint and stop” in four positions like they’re shooting a production gun. Move whenenver you can. Practice gliding across ports and shooting while moving fairly quick. You have a rifle. Press that advantage. You didn’t mention table starts. Get really, really good at unloaded starts from the belt and off a table. A lot of us have blown one of those pretty badly. Switching shoulders, too. Both in classifer flatfooted scenarios, and on the move to a corner with a really hard lean. I’m a lefty and locally we have lots of tight righthanded leans. I got pretty good at swapping shoulders, so it’s amusing now to watch the righties who don’t work on it.

@AngelDeVille what division are you shooting in and what kind of gun? You’ll get much more relevant answers with that information.

Don’t sell it here. Everyone here knows better than to buy a Kimber. That’s actually not brand hate, just the fact that you don’t get enough gun for their price point. Kimbers sit for a while in the classifieds section while SA ROs and DW PM9s get snapped up. It’ll sell easily enough on your local community’s gun form though.