Mark_Mark
Member
- Joined
- Jan 9, 2021
- Messages
- 18,010
I have both FL and neck die, it came with the Lee set. I got the brass from my brother who already sized and trimmed it. Crimp, I’m putting a very very light crimp, just to smooth out the neckI presume you full length sized the cases. If you didn't you should.
Are you using a small base die? Most of the time you don't need a small base die to load for a semiauto but there are exceptions.
If you are crimping the bullet you shouldn't. There is no need to crimp 223 rounds. If you are crimping that is probably your problem.
Don’t bother. An undue risk of pushing out the shoulder, precisely, or just slightly below, where the bright ring is on the offending case.Crimp, I’m putting a very very light crimp, just to smooth out the neck
It's hard to tell in the pic but I am wondering if your shoulder is getting bulged out a little, perhaps during crimping or seating?
I blacked out the case, and looks like the there is wear in the shoulder.
If you are crimping that is probably your problem.
I'm seeing a pattern.Crimp, I’m putting a very very light crimp, just to smooth out the neck
Definitely do that, and if you want to crimp, re-adjust it for a veerry light touch. The leverage of the press hides how hard the crimp really is. It is very, very, easy to bulge a .223 shoulder just a tad.I’ll try resizing again with FL and see what happens
not case guaging... don’t even know what a case gauge is. the round thing you drop your case in??? like a go/no go gauge?If your having extraction issues with a never used gun I would check the offending component first. Assuming your loads are good. Are you case guaging them to verify they are in spec.
Quite!CONCLUSION: loading rifle is not like loading straight wall.
quitting gives me nightmares!Quite!
But ever so more rewarding when done properly, as compared to pistols cartridges, in my opinion.
Gauges are a good idea, but if it’s only the one rifle I’d just work with the chamber.
I think you have a good plan going forward.
Thanks! I away have my test guns point at a safe direction regardless of dummy round or live round..... just good practicejust to be clear your loading this by dropping the bolt from the bolt stop? AR extractors snap over the rim, as opposed to sliding over, so it takes a significant amount of force on the bolt to close fully and get the extractor on the rim. Slamfires are uncommon, but can happen, so point in a safe direction.
what’s wrong with it?I'm seeing a pattern.
Definitely do that, and if you want to crimp, re-adjust it for a veerry light touch. The leverage of the press hides how hard the crimp really is. It is very, very, easy to bulge a .223 shoulder just a tad.
Looks ok to the naked eye. right? Well, it isn't.
View attachment 991310
By the discrepancy in the reflected light along the shoulder angle, and the break just below it, it was crimped too far. This causes a flare out right at the shoulder angle, making the case too wide there, and scrubbing any marker indicator off.what’s wrong with it?
No, I mean, quite, as in very.quitting gives me nightmares!
Not necessarily. Got to try it to see.is 75gr BTHP a bad idea for 20” 1:9 AR barrel?
thanks for the 75gr approval!By the discrepancy in the reflected light along the shoulder angle, and the break just below it, it was crimped too far. This causes a flare out right at the shoulder angle, making the case too wide there, and scrubbing any marker indicator off.
No, I mean, quite, as in very.
Quitting, won’t get it to work...
Not necessarily. Got to try it to see.
” BCA barrel
H Match 75g BTHP
COL 2.250
yeah, most of the issues with the feed ramp. was rough, so I smoothed itWait... what?
I must not understand what I'm seeing or it's a joke....case gauging, extraction issue, feed issues SOLVED
now it feeding really smooth, the extracting nicely.
it’s a new rifle, 20” with 1:9. examine the feed ramp and barrel extensions, and there was brass shaving everywhere. So I deburred the ramps and polish it. I also did not crimp the dummy rounds. I still want a light crimp, but I’ll test that later
Next Step.... Load development!
Having fun
View attachment 991535
I de-burred and polish the feed ramp of the barrel. That was part of the feed issues.I must not understand what I'm seeing or it's a joke....