RockRiver
Happy to be here
What do you guys use to load subsonic 300 blackout for plinking? I'm planning on developing a 110-125gr load for close range hunting but I want a cheap 200+gr bullet for suppressed fun.
Any ideas?
Any ideas?
https://palmettoprojectiles.com/
These work very well for me with both A1680 and Shooters World Blackout
Do you seat yours as deep as they call for? 1.95" seems really short, but I haven't seen the bullets. I've got some W296 already that I'll try and I think I'll pick up some A1680. I'm gonna have to get a flaring die as well.https://palmettoprojectiles.com/
These work very well for me with both A1680 and Shooters World Blackout
Just starting to load .300BLK and I'm leaning toward either the leatherhead @ .14c or Berry's plated @ .22c. I'm concerned about shooting cast through my suppressors but the .14c price point is damn tempting.
My gun is a 10.5" 300 BLK. I seat these at 1.96" over 9.0gn H110 to stay subsonic. 9.4 would go too fast. I developed this on my own without the chart above. Had to seat short to clear the lands. These pills do not have the long taper point you find on a FMJDo you seat yours as deep as they call for? 1.95" seems really short, but I haven't seen the bullets. I've got some W296 already that I'll try and I think I'll pick up some A1680. I'm gonna have to get a flaring die as well.
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My gun is a 10.5" 300 BLK. I seat these at 1.96" over 9.0gn H110 to stay subsonic. 9.4 would go too fast. I developed this on my own without the chart above. Had to seat short to clear the lands. These pills do not have the long taper point you find on a FMJ
I will check this tonight and get back with you, I didn't clean it after I was done shooting. If I do, does that mean the bullet is going too fast for the twist rate of my barrel?Good choice there... yes it sounds like they are tumbling.
Did you find any leading in the barrel or at the muzzle?
Unlikely.I will check this tonight and get back with you, I didn't clean it after I was done shooting. If I do, does that mean the bullet is going too fast for the twist rate of my barrel?
Are you expanding the case neck before seating?
There are lots of possibilities. Catfish's post is good, always check basics. It may be that the case neck is resizing the part of the bullet that's in the case, which can cause leading and poor accuracy. The solution is to try a larger expander to expand the whole neck, not just flare the entry. I'm not familiar with the lee die, I either use a lyman m die or use the powder funnel on the 550b.
I'd start by flaring more than you think is necessary. I use the same bullets and I don't get any swaging or crimp ring in mine. But I open up the case mouths noticeably. If you just can't get that to work try contacting Lee for an oversized mandrel instead of buying a whole new die.
ETA: assuming Lee dies?