I have a Rem 788 in 22-250. I am loading it with 34.0 gr. IMR 4064 with a 53 gr. V max. I took 10 rounds out to establish the load on paper and after 3 rounds I walked to the target to see how it had fared. I noticed all 3 rounds had started to key hole. Kind of egg shaped. I went back and fired 3 more and found the same thing. Also, the groups were like 4". I realise the bad groups were probley because I hade'nt worked up a load yet but the other is driving me crazy. I've had that problem from loading to heavy a bullet, but these are only 53 gr. Can any body help me?