Odds are its the converted brass if the majority of your reloads functioned at those bullet diameters and seating depths. It makes a for a fun and easy load for 1-8" twist 300BLK rifles once you get the kinks ironed out.
Odds are its the converted brass if the majority of your reloads functioned at those bullet diameters and seating depths. It makes a for a fun and easy load for 1-8" twist 300BLK rifles once you get the kinks ironed out.
I Cast my Boolits, Therefore I am Happy.
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bruce drake, I believe you are correct. I will do some measurements tomorrow. I also have a 1 in 8'' 300 BO. But, mine is a 10.5" pistol barrel. Randy.
I’ve got some NOE molds, if you would like to try some out before you get a mold, I’ve got a 310-130SP and a 225 round nose
WinchesterM1, Thanks for the gracious offer. I PMed you.
Gentlemen, I did some measurements today. The board members guessed correctly. My cases outside daimeter at the neck are large. Here are the measurement.....
300 BO case measurement result's
Factory G&L 300 BO cases - resized - before loading
.325” to .326” outside diameter
Unfired loaded cases that would not fully chamber
G&L Coverted cases / #1 – outside dia .335” / #2 – outside dia .337” indside AVG – 10 to .11 thou
So. If I understand correctly. Some of my converted cases OD is too large. The inside Diameter seem 2 be OK>
Toss, or turn necks of offending cases. Thanks, Randy
Brownell's sent update. Powder has shipped, has track number.
Last edited by sixgunner452; 11-08-2021 at 06:43 PM.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |