Sierra 88 TMK Load Data

[Scooby-93]

Book max of n565 22 creed. 16".

Ha, first two shots with this rifle I haven't shot in a while didn't go good

Going to increase my neck tension and try it again. This gun keeps doing the double cluster in a single group. Measured my case mouths with a loaded round. Was at .251. lol my bushing is .250
15 shots total.

What charge of n565? I run n565 45.6gr 88eld and it shoots lights out.

Check your action/base screws and make sure your barrel isn’t touching barrel with split groups.

Please update

 

[Scooby-93]

@SloppyJ . Did you happen to measure case head expansion at .200 line after first firing on the new brass? Thinking I'm going to give the Alpha brass a try this summer

+1 @SloppyJ have you measurements before and after?