Home Forums Reloading Big Game Rifles OCW: GAP 300WM 190gr SMK RL-22

I've had this rifle built in 2007. It was built by George himself. I've shot match grade ammo, reloads and everything in between. I've never really been able to get anything under .75 MOA until today.

I started fiddling (AGAIN) with the 190gr SMK's and Reloader 22 again today. Doesn't GAP base most of their rifles off of the FGMM round?

According to OnTarget the best groups today were 0.597" and 0.599" both at 73.4gr.

Load Data:
Federal once fired brass
190gr SMK
FGMM 215M
RL-22 (Charge as shown)
2.873 (Base to Ogive)
Set at 2.863 (0.010 off lands)
Reloaded on Forster Co-Ax
All charges weighed on Acculab
Redding Type-S Competition Dies w/ 0.335 bushing

Sierra's Max load was 72.7gr (I never saw pressures signs on any of my stuff)

Below are my targets. Any thoughts?




Is it me? Is it my shooting?

To my eyes, you have a scatter group at 73.2g. The reason I say that is that you have 2 bullets that group with the 73g load and 1 that groups with the 73.4g load. Therefore, the OCW should be 1.5% above and below the scatter group. That would make your OCW charge at 72.1g and 74.3g. I dont see that covered in your test.

I would reshoot around 72 and see if you get consistent POI.

Went out and shot some more groups this morning. I focused on 73.0, 73.2, and 73.4 and set the jump to 0.05". I think I'll focus on 73.4 and 73.6, but put the seating depth at 0.01".

I should also mention I have dumped all my Federal Brass and am now shooting virgin Winchester Brass.