45r wrote:I think mine is overgassing,it has ripped rims with reloads that don't look overpressured.If I go to midloads it seems to do OK.I haven't had much time with it yet but I might have to put some sort of gas adjustment system on it.I like overgas for downloads but not good for getting max velocity.The rifle has gobs of power so using mid level reloads would be OK anyway.I haven't got swiping or brass flow of any sort just a couple ripped rims and a couple that almost ripped off.The reloads used 36 to 38 grains Lil Gun and that should be well within pressure limits.The bolt is opening too soon for some reason.Mine is a 20 inch barrel and I think it would be better with a longer gas system.
Ok, for what ever reason you are at, what I call the "WALL", where the bolt is trying to open, before the round has released it grip on the chamber walls (a normal effect, because of the low pressure Factory loads and then need for a carbine length, gas-port, because), thus the ripped rims. You'll need to back off on you already mild load of lil gun, to increase the dwell time. That should stop the ripping of the rims. I very soon (gotta get some guns <three 45 Pro's> out of the shop first), I will be offering a mail-in option/conversion for your barrels, that will Hugely increase the dwell time, allowing much more and slower powder types, thus Dramatically Increasing Bullet Speeds, with out hitting the "WALL". This is the very conversion, that allows me to get 2500-2800fps++, with bullets ranging in the 230-250gr area, without hitting the Wall or ripping rims, of course, without question, you're going to have to be the final arbitrator, as to the safety of such loads, even though many here are already at those speeds and pressures.
The premise: Getting pass the WALL, that is plaguing 45r here and just so many others..
..Just as a feeler here, how many of you guys would consider such a conversion? One that would allow you to use the elevated loads, i.e. Hy-Performance Loads, and the factory loading, interchangeably, which is a quality the majors will never offer, any time soon, because they really can't do it in the first place (too much to do, to make mild and hypo loads work interchangeably, within a semi-auto rifle. Heck, they are just now getting around to doing that in shotguns, so maybe in fifty years we can expect them to to it in rifles)..
..t
Colorado Elk herd better watch out this year!
I looked around and sure 'nuff it was lying on the ground off to my right. It did not however, cycle the bolt back far enough to latch open. I do know that lighter loads than that did not eject. So, if you intend to load lighter than 24gr of Lil Gun, it may contribute to them not ejecting. Then again, I'd bet no one will be loading a round that light, carrier weight or not. 
