I think I got it.

[tdkahn]

Started reloading for 22-250 few weeks ago. Loaded 5 round per charge, increasing 1 grain at a time. 40grain Sierra HP, 26 grains of IMR4198 and I got this at 100yds form my Ruger M77 Mark II. I pulled 1 shot (under the penny), but group of 4 in the circle.

 

[Broom_jm]

If I had a dollar for every time I had a one-hole group spoiled by pulling a shot, I could afford the cost of ammo today!

 

[GBolt]

Great grouping! My OCD would be bugging me to move that group a 1/2" left...which would likely result in no more grouping.

 

[bstewrat3]

Very nice group. More impressive is the fact that you got it with a powder that is not optimum for the 22-250. 26gr leaves a lot of air space in that case.

 

[Broom_jm]

Huh, that really is an odd powder choice for the 22-250. In fact, that just doesn't sound right at all. Neither Hodgdon, nor Lyman, shows 4198 with any bullet weight for that cartridge. Why such a fast powder?

QuickLoad is predicting only ~33,000psi with that charge, and about 3,500fps. I guess that's plenty fast for the lighter 40gr bullets?

 

[tdkahn]

Huh, that really is an odd powder choice for the 22-250. In fact, that just doesn't sound right at all. Neither Hodgdon, nor Lyman, shows 4198 with any bullet weight for that cartridge. Why such a fast powder?

QuickLoad is predicting only ~33,000psi with that charge, and about 3,500fps. I guess that's plenty fast for the lighter 40gr bullets?

I bought a bunch of reloading stuff off my neighbor and there was a 1lb can of it and 300 40gr bullets (that was what he used). I have a Lyman vol 47 book that uses it for a 45gr lead bullet 17-22grains of powder. I went from there 5 rounds for each 1 grain of powder increase. I found (after 2hrs of looking) a Sierra vol 5 load online calling from 27.6 to 30.3grains for a 45gr bullet.

Figure I'll use these for groundhogs and other small pest and the AR for coyotes.