Changing primers

[bob4]

Have a nice load developed for my Rem 700 in 270. I am 1gn short of max load and want to try federal primers(210) I finally got my hands on.
Is backing off my H-4831SC by one whole grain sufficient enough to try a different primer? There are no pressure signs where I am at now.
Been using CCI LRP(200) up to now. FPS is 2906 +/- 4

 

[Barrelnut]

I think that is sufficient. I backed off 1 gr when testing CCI250 and F215 primers in a 300 RUM and it was plenty. 1 gr in the 270 is actually more even volume wise. I found the F215 hotter in the RUM. But lot to lot it might easily go the other way as different people seem to get different results from time to time.

 

[Frank in the Laurels]

It sometimes will cause a change but I've never seen a drastic jump upwards when changing primers but sometimes there's an amazing difference in group size. A grain or grain and a half if you feel the need will be fine..good luck..