Re: Am i doing something wrong?
This can be frustrating I know. I have this happen in our Arizona temperatures and believe a lot of it is environmental conditions, Temp, Humidity, Pressure etc. . . I have a .300 that clover leafs when over 85 then opens up in cooler temps. I don't hunt much in 85 degree temps. Also check your groups at longer distance they probably hold same MOA (don't get worse/stabilize) A lot of good advice was given 1) 3/4 MOA in a high power/magnum is sufficient, even good for long range 2) try different powders, the IMR/H brands have been much less sensitive for me 4831sc and 4064 specifically. 3) I went to the OCW (Optimal Charge Weight) method for developing hunting loads, google it. This method has produced more consistent results at long distance with less shift in impact which is what I am looking for. Sometime the tiniest groups DO NOT translate into the best long range load for all conditions. Sounds like you are doing fine. This is what keeps us buying products and people inventing right!