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What powder John?

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With the 150gr NBT I use to run in my 22 " 284 I only used a stiff charge of 2209, 2970 fps and shot really well.

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IMR 7828ssc also goes well in 284 with heavy for cal bullets.

I've tried all of the above in mine, got higher velocity with some but the grouping wasn't as good as my h414 load.

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Heavy bolt lift and ejector marks on brass at charge levels lower than I expected the max would be.

After I neck turned a bit more things improved and I could run higher charge weights. But I...

Yes that all sounds about right.

My M595 was rechambered a long time ago before my ownership.

It has a .322 neck, I'm running new WW brass in that which measures .313 on a loaded round. So yeah...

2209 should give you a bit more velocity with 162s than 2208 I would think.

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Yes factory 9.5 twist tikka barrel.

Yeah the velocity and corresponding ballistics with that bullet are certainly quite impressive from the humble little 284 and 22 inch tube.

It certainly...

I've got a couple of 284 wins.

Both rechambered tikka 708s.

One is a T3 cut to 17" with DPT magnum suppressor. Long mag and bolt stop.

The barrel was throated long to suit 162s seated out in...