Sierra 116 TMK Load Data

[Q_Sertorius]

Can be some pretty big lot variation in h4350. I opened a new jug recently that seems significantly faster than the prior lot I was using.

I had the same variation from one pound to the next.

 

[Deadspace]

Can be some pretty big lot variation in h4350. I opened a new jug recently that seems significantly faster than the prior lot I was using.

Glad I bought the 8lb jug. Have about 6 lbs left which should take me to the end of the barrels life

 

[HuntHarder]

I posted a year ago about my H4350 diffetence between 2 different 8#'ers. I lost a 100 fps on the new jug.

 

[eric1115]

.243AI 19" factory Tikka 8 twist cut and chambered by Kampfeld, 700ish rounds on the barrel

H1000, BR2, Lapua brass. 2.950 COAL, jumping 0.080+, didn't really get too persnickety with finding exact distance to lands as it's plenty.

Loaded two of each charge weight, ran one batch with the suppressor on and one with the magnetospeed because I'm one of those idiots who still doesn't have a Garmin.

This barrel/chamber has showed pressure earlier than some of the .243AI data that I've seen out there. I'm not too worried about it, as it's been consistent and if I were a barrel cleaner (or willing to load further into pressure signs) I bet I could push it harder. I'd rather have consistency/stability than an extra 50 FPS.

46.0 2723
47.0 2766
48.0 2839
49.0 2926 Light swipe with can on, none with bare muzzle
50.0 2980 More swipe, slightly heavy bolt with can, lighter swipe and lighter (but still slightly heavy) bolt with bare muzzle.

I loaded 10 at 48.0, will report back after I get a chance to shoot. 3/5 went in one .5" group, the other two were less than 1" away so I'm hopeful that the middle of this range is going to shoot pretty well.

That's not too bad, zero "development," just picked a safe charge weight from my pressure check, seated to mag length, and shot 10.

.243AI
116 TMK
48.0 H1000
BR2, Lapua brass
2.950 COAL

Middle target

 

[mtnbound]

Tried some Grand today. 116TMK, Hornady brass, Fed 215 primers, 2.80 COAL, 6CM, 16.5” PBB 7.5twist. Emarks on the 44gr.

 

[wysongdog]

I probably missed it but what about the 6 um with these 116’s?

 

[Ryan Avery]

I probably missed it but what about the 6 um with these 116’s?

This is 66g of 570 90 thou off. It was almost dark, I had a nice 8 shots going, and my can came loose, a rookie mistake, but she looks promising.

 

[B_Reynolds_AK]

Tried some Grand today. 116TMK, Hornady brass, Fed 215 primers, 2.80 COAL, 6CM, 16.5” PBB 7.5twist. Emarks on the 44gr.

Ewww. That’s slow.

 

[Nine Banger]

6mm CM
44gr H4381SC
2.680"
16" 1:7.5" bbl
116gr tmk
2700fps

This is going to be "the load" for a 16" gun.

It's blowing 9mph full value and gusting here.

I got burned on the right target because I forgot it's a 7mph gun and held .2 mil.

Held .1ish mil on the left target.



I bet it will be 1.5moa or better when I shoot on a still morning.

Gun is still zeroed for Nosler Factory 115gr RDF.

The Frankford Arsenal universal seating die that Form recommended does not mark the bullets.

 

[Skinnyguts]

44gr H4381SC
2.680"
16" 1:7.5" bbl
116gr tmk
2700fps

This is going to "the load" for a 16" gun. View attachment 1055507

It's blowing 9mph full value and gusting here.

I got burned on the right target because I forgot it's a 7mph gun and held .2 mil.

Held .1ish mil on the left target.

View attachment 1055506

I bet it will be 1.5moa or better when I shoot on a still morning.

Gun is still zeroed for Nosler Factory 115RDF.

The Frankford Arsenal universal seating due that Form recommended does not mark the bullets. View attachment 1055508

6 CM?

 

[Nine Banger]

6 CM?

Yes. Thanks for the call out. Edited.