88 TMK Loading Thread

[mwoolsey5]

Apologies in advance, I’m a complete amateur when it comes to hand loads and reloading still, but trying to learn. I plugged everything into an ai tool, but could someone verify I have the correct COAL length before I load some of these up.

22 CM
.120 Freebore
88 TMK
Hawkins Hunter DBM Short

Hawkins website says the Hunter DBM short magazine has an internal length of 2.880”. AI tool says the ideal length is 2.65-2.75” to touch the lands, but that I’m limited by the magazine and need to have a COAL of 2.5-2.52” to ensure smooth feeding and that the tip doesn’t drag in the mag. Does this sound correct or should I be loading up a dummy round at the longer COAL length to see how it see if it fits the mag and/or feeds well?

 

[43.6N]

View attachment 1044659
Apologies in advance, I’m a complete amateur when it comes to hand loads and reloading still, but trying to learn. I plugged everything into an ai tool, but could someone verify I have the correct COAL length before I load some of these up.

22 CM
.120 Freebore
88 TMK
Hawkins Hunter DBM Short

Hawkins website says the Hunter DBM short magazine has an internal length of 2.880”. AI tool says the ideal length is 2.65-2.75” to touch the lands, but that I’m limited by the magazine and need to have a COAL of 2.5-2.52” to ensure smooth feeding and that the tip doesn’t drag in the mag. Does this sound correct or should I be loading up a dummy round at the longer COAL length to see how it see if it fits the mag and/or feeds well?

Do you have the magazine on hand?
Make a dummy round of your chamber, and see how it fits in the mag.

 

[BlueJay]

Did some initial load development with 88gr TMKs today in my 22 Creedmoor with a 20" barrel. I had tried previous workup with 88 ELD-m and couldn't get them to group well. Loaded up Alpha LRP brass with the TMKs at 20 thousands off jam and Reloder 23 with three rounds at each charge weight (36 grains up to 39 grains in 0.5 grain increments). Everything over 36.5 charge weight shoot itty bitty groups; 39.0 grains had no pressure signs and an average velocity of 2880fps. Going to load up 30 rounds with 39.0 grains to get a better sense of the true dispersion but this looks really promising. This is a pretty new barrel so I expect it'll speed up.

 

[BBob]

22 CM
.120 Freebore
88 TMK
Hawkins Hunter DBM Short

Hawkins website says the Hunter DBM short magazine has an internal length of 2.880”. AI tool says the ideal length is 2.65-2.75” to touch the lands, but that I’m limited by the magazine and need to have a COAL of 2.5-2.52” to ensure smooth feeding and that the tip doesn’t drag in the mag. Does this sound correct or should I be loading up a dummy round at the longer COAL length to see how it see if it fits the mag and/or feeds well?

Post in thread 'The 22 creedmoor thread'

Thursday at 11:41 AM

That and I’ll add if you want an 88 ELDM specific freebore it’d be approximately .170”. That puts the shank ~.050” above the neck shoulder junction at touch and the OAL still has plenty of room to fit most all common magazines and boxes.

What would the OAL be with this specific freebore and the 88eld at touch

~2.770”

After a quick look with 88 TMK’s it’s pretty much the same. Base of the bullet shank in the neck with the TMK is pretty much the same as well. Basically an equal swap or near equal swap between the two 88’s.

• BBob