Thread: Accurate subsonic .357?

Hello guys, I just bought a Marlin .357 and put a DPT suppressor on it.

All my shooting is plinking at the range so the key is accuracy.

I also bought a Lee 358-150-1R mould and cast off a quick batch of projectiles and loaded them with 4gr of AP70N (50 total). I wouldn't consider the grouping to be that great though there were gusty cross winds and an 8 pound trigger which has now been fixed to 3 pounds. They grouped anywhere from 8-10MOA (4-5" @ 50m). There wasn't any load data for this weight projectile so I interpolated start loads for 140gr and 158gr cast anticipating around 900FPS. I also shot my supersonics and got 3.5" @ 100m so I know I can pull these numbers in on a more favourable day with better trigger now.

I was wondering firstly if anyone has had luck with this 150gr projectile in subsonic loads (what powder/load) and secondly, what other success have you had with ANY .357 subsonic loads (projectile weight/powder/load)? I'd consider a commercial bullet or purchasing another mould if I can find one.

My carbine only has a 16.25" barrel 1-16 twist. Yes I fully understand what worked for you may not work for me. Just looking for ideas.

I'll load up 10 of each with these loads 3.6, 3.8, 4.0, 4.2, 4.4, 4.6. Hoping to pull that group into 1.3" @ 50m or 3MOA.