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