95 TMK in 6 CM

[Nine Banger]

Here's a Quick Drop load if you seek it:

16.25" bbl
48gr H1000
2.680" OAL

2775 fps

600 yard gun.

 

[NoDakhunter]

Not off to to a hot start with TMKS. Tried a full case of RE16. Going to try again with some h4350. 112MB were not a fan of 16 either. However, they were 2ish moa rather than 6.

 

[Ajsomp]

yikes. H4350 with TMKs in my 243 is about 1.5” - 1:8 twist though. Makes me wonder if I even bother throwing my 18” PBB 1:7 on the rifle after the season

 

[Formidilosus]

View attachment 961081
Not off to to a hot start with TMKS. Tried a full case of RE16. Going to try again with some h4350. 112MB were not a fan of 16 either. However, they were 2ish moa rather than 6.

What’s the barrel?

 

[NoDakhunter]

What’s the barrel?

16.5” 7.5 twist Wilson blank chambered by Drew’s Precision

 

[pods8 (Rugged Stitching)]

Not off to to a hot start with TMKS. Tried a full case of RE16. Going to try again with some h4350. 112MB were not a fan of 16 either. However, they were 2ish moa rather than 6.

A pattern that bad would have me questioning if something was loose on the rifle/scope but you said the 112MB were ~2moa (same session)?

 

[NoDakhunter]

A pattern that bad would have me questioning if something was loose on the rifle/scope but you said the 112MB were ~2moa (same session)?

correct. Shot about 10 minutes apart. Did a ladder test for pressure this morning. This was rounds 20-30 down the tube. Mounted everything up last night. Degreased, loctite, torqued to spec with UM rings. Unless the suppressor came loose

 

[Formidilosus]

16.5” 7.5 twist Wilson blank chambered by Drew’s Precision

Check your twist; or something came lose.

 

[Nine Banger]

View attachment 961081
Not off to to a hot start with TMKS. Tried a full case of RE16. Going to try again with some h4350. 112MB were not a fan of 16 either. However, they were 2ish moa rather than 6.

Crap dude. Are you sure that's not my target? I took my gun apart and retorqued and it's still running like a Turkey choke.

Did you check your lands? Excess jump is on my list until I rule it out when some new projectiles show up.

 

[NoDakhunter]

Check your twist; or something came lose.

Twist is good. I’ll report back tomorrow. Hoping I don’t have @Nine Banger ’s luck

 

[Nine Banger]

Twist is good. I’ll report back tomorrow. Hoping I don’t have @Nine Banger ’s luck

I'll see is there is a lot # on my bullets later.

You don't want my luck...

 

[Formidilosus]

Twist is good. I’ll report back tomorrow. Hoping I don’t have @Nine Banger ’s luck

Have you physically checked it?

 

[pods8 (Rugged Stitching)]

18” PBB 1:7
5 rounds (inside circle is 1”)
109 ELDM
40gr H4350
Peterson Brass
White River primer
2.810” COAL

How much are you jumping in your barrel?

 

[NoDakhunter]

Have you physically checked it?

Yes I watched a YouTube video and checked and double checked when you asked. 7.5 on the nose.

 

[Bluumoon]

How much are you jumping in your barrel?

Didn’t check, loaded to same COAL as the factory 108s I had on hand, made sure I wasn’t jamming into lands and called it good. When I saw the groups while checking for pressure I didn’t pursue any changes.

 

[pods8 (Rugged Stitching)]

Didn’t check, loaded to same COAL as the factory 108s I had on hand, made sure I wasn’t jamming into lands and called it good. When I saw the groups while checking for pressure I didn’t pursue any changes.

Can't blame ya! I was just curious, I have a 18" pva barrel with nearly the same load and components (WLP primer) loaded a little longer with .2gr more powder. I'm 0.05" off the lands. I tried a couple longer seating depths but didn't try a shorter COAL. Mine is shooting looser than that. I'll give your version a try when I get time just to see what it does.

 

[NoDakhunter]

H4350 didn’t help any. 43 grains at 2.69”

 

[KyleR1985]

View attachment 961533
H4350 didn’t help any. 43 grains at 2.69”

Can you try a longer COAL? At 2.745”(.070” off lands) I got a tightish group. Backing off to .080 and then to .090 of got progressively worse.

 

[NoDakhunter]

Can you try a longer COAL? At 2.745”(.070” off lands) I got a tightish group. Backing off to .080 and then to .090 of got progressively worse.

I’m thinking it’s barrel issue. Just shot 10 matchburners with 4350. 7 of them them were a hair under 2moa and the other 3 opened it up over 3 moa. I rechecked torque on everything last night and verified twist with cleaning rod. Frustrating …

 

[Formidilosus]

Can you try a longer COAL? At 2.745”(.070” off lands) I got a tightish group. Backing off to .080 and then to .090 of got progressively worse

Changing distance to lands isn’t shrinking a 4+ MOA group. Something is MASSIVELY WRONG.