What speed for 107gr SMK

[Ajwilly96]

Some info on my rifle, tikka T3 action, 6XC barrel cut by patriot valley arms. 26 inches 1:8 twist rem varmint contour. KRG X-Ray chassis About 350 rounds down the barrel

I’m currently loading 38.7gr of H4350 at 2898fps ES 6 SD of 3.1

I have tried Varget as well. I dialed in my velocity and then played with seating depth. .020 off has produced the best group which is just a hair over a half MOA at 100. I’m not extremely happy with the accuracy as I stretch it out in distance.

Do these bullets tend to like a little bit faster than what I am pushing them or slower?

 

[NTHIGPEN]

I shoot them around 2900 in my 6gt. If they shoot the best for you at 2898 that’s where I would run them. I shoot over a chronograph a lot for reference, but ultimately I measure groups for my final opinion of a load.

 

[NZ_Fclass]

I hane run them between 2800 in a BR and over 3000 in a 6SLR. Seems to work at all speeds.

 

[Idaho-Lefty]

I run them around, 2,930 FPS with, 40.5 gr's of StaBall 65, LRP F-210 M's, Norma Brass, in my, 24" Criterion Barreled, 6 XC and at, a Lite Jam with, .010 -.012 long rifling "Marks" all the way around the Bullet and am getting groups, in the .2's and .3's.
First loads tried were, 40.7 and 41 grains, with .025 "Jump" that, shot in, the 4's to, 1/2 MOA @ 2985 FPS
Read many older Posts where guys said to, "Jam them'" and it,.."Works" !
Just be sure to "back off", a 1/2 to One grain of, Powder from MAX Chg.,. Good Luck !

 

[swd]

I run 107’s in the lands until the engraving marks are square. 3030fps was an outstanding load in my BRX with RL16 in a .236” 8” Krieger

 

[Idaho-Lefty]

You're "Close" on powder charge but, I'd Try,.. 39. to 39.5 gr's of your 4350 and, at, a Lite Jam ( .010 to .015 ) Squared Engraving Marks as noted by, swd above !
Then, you should get 2,925 to, 2,950 ish FPS and much BETTER Groups ( Watch for Pressure sign's ! ).
"Jumping" .025 to .030 wasn't that "Good" for Me either and I was getting around, 1/2 MOA groups at, Higher Velocity !

 

[Fast14riot]

I've found jammed to square mark to give best accuracy for me right around 2800 in a 24" 8 twist CBI barrel. I also found that varying neck tension with different bushings affects group size. .265" and no expander in unturned brass has done the best for me.

 

[Dusty Stevens]

3000 is my upper limit for them

 

[JEFFPPC]

In my BRX through many barrels 2970 to 2990 is the sweet spot.

 

[jr600yd]

My 6XC
Peterson LR primer brass
Federal 210 primer
40grs H-4350
Sierra 107 -010
3030fps

 

[Mark W]

I’ve had good success at 2960.

 

[Bill Norris]

I had great results at 2930 to 2980. Barrel was 1 - 8 Tw. chambered in 6BRX.

 

[xswanted]

I’ve ran them from 2700-3100 depending on cartridge.

I feel like the best speed to be consistent with them is either around 2900 or 3050. No clue why, but that’s where they seemed the most consistent to me.

The 3050 load I had many first round impacts on targets from 900-1250 yards at a couple different matches. Elevation was fantastic with that particular load from a 6x47 Lapua.