Got around to playing with the 140 ABs out of my 270 WSM. I tried RL-22, RL-25 and Mag pro. RL-22 was by far the best powder I have played with in this 270 wsm. If only I had listened to Scotty and Fotis and started with RL-22 I could have saved a bunch of time and money.
My goal with this 270 WSm was to be able to push a 140 AB @ 3200, and be .5 MOA or better. Well I was able to reach that this afternoon.
View attachment 3
This was the winner so far. 67.5 gr RL-22, 3212 es 15 sd 7.
View attachment 2
This was the work up with RL-25. Started at 69.5 (bottom) and worked up to 70.5 (top) Over all it has the best average groups, but I was not getting the fps I was looking for.
View attachment 1
This is my RL-22 target. I shot 67 gr first (bottom target, top group) and was a bit dissapointed, then I shot the 67.5 load :grin: I got the speed, and groups I was looking for and didn't have any psi signs. I shot 68 gr, and pulled the second shot pretty hard to the left. I knew it was left before I got the scope back on the paper. I don't know if I'll retry this load, it was a bit faster and with the exception of the one I pulled shot just as good. I clocked it at 3230 with a es of 8 and a sd of 4 :shock: . The next load was a half grain higher and I got some sticky bolt lift, and a psi spike. Those three shots went 3281 with an es of 8 and a sd of 4. I'm a bit worried about shooting the 68 gr load if it warms up another 40-50 degrees so I'm sticking with the 67.5 load.
This was with MagPro. I started at 70.5 (bottom) and went up to 71.5 (top). 71 shot really well also, but was not as fast as I would like. I had room to go up in powder charge, but I kind of figured whats the point after I shot the RL-22 loads.
I know that all these loads are well above the Nosler max, but they are right inline with QL, and I worked up from a safe charge. My CAOL at the lands is 2.930, so it is a lot longer that the factory specs. All the loads were shot at .020" off the lands.
My goal with this 270 WSm was to be able to push a 140 AB @ 3200, and be .5 MOA or better. Well I was able to reach that this afternoon.
View attachment 3
This was the winner so far. 67.5 gr RL-22, 3212 es 15 sd 7.
View attachment 2
This was the work up with RL-25. Started at 69.5 (bottom) and worked up to 70.5 (top) Over all it has the best average groups, but I was not getting the fps I was looking for.
View attachment 1
This is my RL-22 target. I shot 67 gr first (bottom target, top group) and was a bit dissapointed, then I shot the 67.5 load :grin: I got the speed, and groups I was looking for and didn't have any psi signs. I shot 68 gr, and pulled the second shot pretty hard to the left. I knew it was left before I got the scope back on the paper. I don't know if I'll retry this load, it was a bit faster and with the exception of the one I pulled shot just as good. I clocked it at 3230 with a es of 8 and a sd of 4 :shock: . The next load was a half grain higher and I got some sticky bolt lift, and a psi spike. Those three shots went 3281 with an es of 8 and a sd of 4. I'm a bit worried about shooting the 68 gr load if it warms up another 40-50 degrees so I'm sticking with the 67.5 load.
This was with MagPro. I started at 70.5 (bottom) and went up to 71.5 (top). 71 shot really well also, but was not as fast as I would like. I had room to go up in powder charge, but I kind of figured whats the point after I shot the RL-22 loads.
I know that all these loads are well above the Nosler max, but they are right inline with QL, and I worked up from a safe charge. My CAOL at the lands is 2.930, so it is a lot longer that the factory specs. All the loads were shot at .020" off the lands.
I guess I will have to try R19 in my son's 300 WSM. 
