Hi to all out there, I am in the process of breaking in a new barrel, have fired the first 20 roun
ds cleaning after each shot. Am now at the point of shooting 3 shot groups before cleaning.My first group showed a weird thing, at 50 m and at 100 m the bullets are key holing.
I have not chronographed, shall do so on next outing.
Is this some thing to be alarmed about?, does it indicate anything or must I obtain more info, ie speed of bullet etc.
I would welcome any input please.
The rifle is a custom 270 , the rounds are 150 grn Sierra game king and I have started the loads at the minimum recommended for our powder which is Somchem