Sierra 116 TMK Load Data

[KY_coop]

Yes its on the tape. 2553 avg. I am using a jefferson outdoor hinged floorplate, I believe it allows up to 2.485 something like that.

 

[Floridave]

Not sure how helpful this'll be to most, as I'm shooting 243 fast twist loaded long, but I've been trying some powders that I have on the shelf that I don't currently have a particular use for. Seeing if I can find a use for this oddball stuff that I bought when I was happy to be able to buy anything labeled gunpowder.
Anyway, I've tried the loads below, and have settled on my load for the year.

Going to load all these I can with the 2 pounds of powder I have.
243 17 inch barrel 1-7 twist
243 116TMK - 2.96 OAL
Hodgon Superformance 43.4 grains
2731 FPS
5 shot group .418 moa
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Also tried the below, all 2.96oal
Superformance - 43gr. 2701fps same group as 43.4gr. One .4 inch ragged hole for 5 shots
StaBall 6.5 43 gr. 2801fps 1.5 inch group
IMR4831 42 gr 2694fps .78moa 5 shots

 

[WeiserBucks]

Tried a few in my 20" 6 PRC today. 58.0 N570 went 3122 and might be on the edge of pressure. 3/8" 3 shot group is promising and worthy of continuing development.

 

[mcr-85]

I loaded up four more rounds of n570 in the 6-284. 58.0 grains to 59.5 grains looking to find pressure since my 8 shot test didn't show anything. Slight primer cratering on all four. Ejector marks on 58.5 and up. I forgot to press okay on the chronograph and missed the first shot reading.

58.0 - n/a
58.5 - 3151
59.0 - 3181
59.5 - 3209

I think based on this I'm going to load around 57.0 and shoot for groups.



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