Thread: Loading for .300BLK

Originally Posted by Wingman

Yes Std Rem700 AAC Tactical with the factory 16" 1-7" twist 5R rifled barrel. To be honest its not the most accurate .300 BLK/Whisper Ive owned, the 1-8 twist 17" long Shillens shot way better and was better with the lighter 125gr supers as well. 1-7" is too fast for the BLK in my opinion, fine for the 12" pistol AR15s but limited by pressure for the longer rifle barrels with high velocity loads.

Ive used JD Jone's original 240gr recipe since the beginning of this cal and it has shot the best in every .300 Ive owned (12) regardless of barrel length and twist.
Start with 9.3gr or H110 behind a 240gr SMK. Tune to 1020fps from there. if that doesnt get you inside an inch at 100y with 5 shots nothing will.

Cheers for that info. Im going to put together a 300 BLK and im trying to decide between just buying a Remmy or getting a 700 or howa action and chucking a TF 1-8 suppressor barrel on. If I can get a donor action cheap enough im guessing it would be about the same cost all up.