PDA

View Full Version : 311041 in 300 Blackout?


msmyth01
05-12-2016, 01:27 PM
I've Googled, but came away still questioning. Anybody loading Lyman 311041 in 300 Blackout? If so, OAL? I can seat to the crimp groove and still feed properly, but pressure concerns me.Powder recommendations? I have Accurate #9, Reloader 7, access to 1680, W296, and Alliant 2400. Thanks in advance.
BUCKEYE BANDIT
05-12-2016, 01:58 PM
I'm working with that boolit right now,no data even in the Lyman AR manual.Started with 175gr. J-word starting load @1.995 and 1680.Had some feed problems(magazine related I think)shot decent at 50yds but haven't got back to them.
Ford SD
05-12-2016, 03:17 PM
I've Googled, but came away still questioning. Anybody loading Lyman 311041 in 300 Blackout? If so, OAL? I can seat to the crimp groove and still feed properly, but pressure concerns me.Powder recommendations? I have Accurate #9, Reloader 7, access to 1680, W296, and Alliant 2400. Thanks in advance.


Make up several dummy loads (no powder) I think that bullet is too big and flat in the front --but only testing will tell you

the rcbs 150g fp i have just slams under the feed ramp and jams
curator
05-12-2016, 03:43 PM
The Lyman #311041 mould I have casts boolits at .309/299(nose), and has not given good accuracy in my .300AAC AR. It also had minor feeding issues. Another bullet mould I have is a LBT .310-180 LFN SP which casts at .311/303 gives excellent accuracy and feeding with the same COAL and 12.5 grains of AA1680. The #311041 shots great in my .30-30 with deep rifling (what it is designed for) and 1 in 12" twist, but not the .300AAC with its 1 in 8" twist.
Lonegun1894
05-12-2016, 07:27 PM
I use it and crimp in the crimp groove, but my .300BO is a H&R, so feed issues are impossible if it chambers.
rwadley
05-12-2016, 08:30 PM
http://castboolits.gunloads.com/showthread.php?293366-311041-in-300-BO
http://castboolits.gunloads.com/showthread.php?269401-Anyone-tried-the-Lee-C308-170-F-mold-s-boolits-in-their-300-AAC-Blackout-AR-rifle

Check out thes threads.
ShooterAZ
05-14-2016, 05:45 PM
No love for me either with the 311041. It was reasonably accurate, but would not feed worth a hoot. I tried several different magazines, evidently the wider flat point is the problem. Had the same issues with the Lee 150 and 170 FP as well. They were very accurate, but weren't feeding and cycling reliably enough in my AR. The NOE 312-160FN feeds and shoots flawlessly. This one is a winner for me in my Bushmaster 300BLK upper.