88 TMK Loading Thread

[NWBLKTAIL]

8 twist, 20" 223 for the 77 tmk.

7 twist, 16.5" 22 creedmoor for the 88.


I also tested nas3 cases in the 8 twist , 20" 223 for accuracy and velocity.
I used Varget powder with the 88 tmk seated to 2.45 COAL.

Velocities ranged from 2750 to 2900 fps in my ladder. The 8 shot ladder produced a .850 inch group at 100 yards. The 2900 fps charge showed primer catering. This was with Winchester #41 primers. Probably unsafe, so I won't load that hot again. Im hesitant to share my powder charges, because this is uncharted territory and Probably stupid.


I am going to test the 88s out of the 8 twist 223 at distance to see if they remain stable.

I’ve used varget quite a bit in 223 I feel like I have an idea where you ended up to get that speed.

Nice waiting for my box of 100 88’s to show up see if I can stabilize them in 8tw 22-250 at sea level

 

[B_Reynolds_AK]

A lot of guys are concerned about stability in 1:8 twist barrels, from 223 to 22 CM.
I’ll go out on a limb and say that it’s worth building a gun around the 88 TMK.

Whether this is a 1:7 223 with a long throat or any of the bigger cartridges.

The PVA barrel I have on my 223 was an inspired decision it seems.

TLDR: If it doesn’t stabilize, get a barrel that will, because I predict we’re going to see a lot of animals put down with it this coming year.