Sierra Heavy TMK 6MM Testing

[Bluumoon]

Well stuffed 62g of n570 in the 6prc and didn’t reach any type of pressure but yield a velocity of 3260 about 30 fps faster the 109 eldm load I had. Grouped better than the 109’s. N565 at 60.5g yielded the same velocity but started getting into pressure and wouldn’t want to run it there.

What barrel length?

 

[NW_backcountry90]

What barrel length?

21”

 

[mtnbound]

Spun on a new 6CM barrel on my Tikka, so I did some load development today. H4350 and N555 are my tried and trued but gave some Superformance, Hunter, and 4831SC a go along with a few of the new 107TMKs. Only tried the TMKs with Hunter and 4831SC.

 

[huntsd]

Spun on a new 6CM barrel on my Tikka, so I did some load development today. H4350 and N555 are my tried and trued but gave some Superformance, Hunter, and 4831SC a go along with a few of the new 107TMKs. Only tried the TMKs with Hunter and 4831SC.

Good shootin! Hate to see the the 107s grouped the worst!