222 Powder RL-10x

[royinidaho]

Here's the skinny.

Started out chronoing single shots to get a feel for range.

Chickened out w/initiial load of 22 gr.

Grn RL 10x FPS Hor 40 gr V Max
12.8 1903
18 2619
20 2936
22 3249
23 3382
24 3645 - too warm
23.7 3533
23.8 3610

Loaded 5 w/normal seat to fit in magazine
23.8 gr RL10x Hor. 40 gr V Max WSR Primers Federal cases:
Shot Vel
1 3482
2 3542
3 3504
4 3523
5 3482

Average = 3506

Seemed a little warm 60 fps spread. Group size about 1.75.

Figured that if RL-10x is related to 15/19/22 I could seat the bullet out a little further and velocity would go up and pressure would go down. Learned this with the 338 and 270.

So I set the 40s out a little more. Heres the results:
Shot Vel
1 3545
2 3528
3 3543
4 3538
5 3539

Average = 3538

Here's the group. Sure wished I could get that first shot back.

Other than that first shot, the low one, its about as good as the old girl has ever done. Not bad for a rifle that's older than me and I'm oooold