Sierra Heavy TMK 6MM Testing

[ckt3]

haha end of discussion

 

[Liberty Risk]

lol the answer I was looking for and more

 

[blacktailcentral]

Any more terminal reports with the new tmk bullets?

 

[The Guide]

.223 88 TMK at 3400fps
6mm 107 TMK at 3100fps

Which one would would you choose to hunt with. Disregard other factors like barrel life ext.. More of a fun question. Or maybe it's a dumb question..either way I'm here for it.

What cartridge are you going to use to get the 88's up to 3400 FPS? Just curious as I don't know of any that will push an 88 that fast.

Jay

 

[Liberty Risk]

22 prc with a 20in shilen barrel. You can get there with alpha brass and a long barrel in 22 creed but for hunting I like shorter barrels. Wouldn't deter anyone from having fun but as far as juice worth the squeeze to me it wasn't enough to walk away from the 22 creed. Hoping to see someone get the 223 NAS3 case working with an 88 at 100K psi.

 

[TURNER208]

Decided to order 100 to make a dummy round for some 6mm-284 instead of doing a PRC.

Let me know how that works out! Been thinking this will be my next build, the 284 case is one I’ve always been fascinated with even if brass isn’t the most available

 

[IrkedCitizen]

Doesn't Lapua make 6.5-284 brass?

 

[806guns]

They did, believe it was one they quit making a few years ago. I will be using Peterson brass.

 

[SeanM243]

Any more terminal reports with the new tmk bullets?

I've shot a few hogs up to 150 lbs with the 88 TMK and have been happy with their performance. Or are you meaning the 6mm TMKs?

 

[WoolyBugger]

First rounds out the barrel, figuring out where I stand for velocities. 116tmk, Alpha lrp brass, h4350. 6cm 7twist 19” barrel

 

[Orchemo]

I bribed @Tanner with some TMKs and he was kind enough to load some up 6cm for both of us.

He can add in his rifle info, I just know it was a re-barrelled Tikka.

His 107 loading was some tired Starline brass (I believe), 40.5 gr H4350, 10.5 fps SD, 2875 fps avg.

For the 116s, same brass, 39.5 gr H4350, 21 fps SD, 2811 fps avg.

For my MRC, 107s in once-fired Lapua over 40.5 gr H4350, 9.6 fps SD, 2870 fps avg.

For the 116s, same brass, 39.5 gr H4350, 9.6 fps SD, 2800 fps avg - these 5 shots had stiff bolt lift but no other pressure signs. I had 4 more and shot them 10 minutes later with no stiff bolt lift (2805 fps avg, 6.2 fps SD), not sure what was going on there.

Both loads out of both guns were about 1MOA with a stiff breeze and some mirage. Time to load 50 and go kill some bears. I don't know if we will chase a different load for more accuracy; I want to shoot 10 on a calm day, I think .7ish MOA is very realistic.