You're close. Remember thar this bullet is a bore rider. It will likely be in contact with the throat/bore when you chamber itSmurky wrote:Now that it’s finally getting warmer I’m trying to find a load that will work with these bullets. I Sized them on a Redding full size die, used a NOE .312 x 308 expander in a Lee Universal and crimped with a Lee FCD. I didn’t change the crimp from working my previous loads. Worked up some dummy rounds and they’ll cycle out of the mag but unless I shorten them to about 2.050 OAL the bolt won’t close. At 2.050 without powder the cartridge was at 2.0270 with a few marks on the nose of the bullet.
I don’t think I can get these to work any longer in my rifle. The rifle is Mod 1 mk109 upper. 9.5 inch piston Operated upper that I run with a Silencer Co Saker suppressor.
I also checked powder capacity and 8 grains of N105 would be compressed with this OAL.
Looking for opinions, is this just a no go because the cartridge has to be so short? I have N105, N120 IMR 4227 and H110, SW blackout and have a little CFE blackout left. My thoughts here are that a faster powder may be the way so I was thinking N105 or H110 and would appreciate any opinions.
I load them at 2.120 COAL with 7.2 grains of N105. This resulted in an average of 975 FPS, 24 ES and 7 SD. This was with LC converted brass and CCI #41 primers.
This was out of an 8.5" barrel, suppressed, gas port opened up with an AGB. I'm pretty close to sea level.
This load grouped really well at 25 yds, but opened way up at 100. I'll likely speed them up a little next time.