7PRC help please

[Grizzgup]

Hello all,

I have an Sig sawtooth in 7PRC. Shoots great with N570 under Berger 180 targets. The minute I put my otter creek 9L on, the groups fall apart (just over MOA). I expected some POI shift, but not to need to develop a whole new load. Am I missing something here? Or does this sometimes happen? Thanks.

 

[lash]

Hello all,

I have an Sig sawtooth in 7PRC. Shoots great with N570 under Berger 180 targets. The minute I put my otter creek 9L on, the groups fall apart (just over MOA). I expected some POI shift, but not to need to develop a whole new load. Am I missing something here? Or does this sometimes happen? Thanks.

It sometimes happens. I found a similar issue with 190s out of a 30” barrel. Made the mistake of developing my load without the suppressor. I now have to fall back and punt. Sure, the load held up to 1000+, but that’s not what this rifle was for and groups went from 1/2” to 3/4” plus at 100.

So, of course, , I just decided to go for a 195 EOL load instead. I bought them, might as well use them if possible.