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I just simply wait one minute between shots, when trying for groups. If it is a sunny hot day and you are not shaded the barrel is going to be hot without even shooting, to hot, is when barrel is almost to hot to hold onto.
Hunting zero's are always done from a cold fouled barrel, some rifles can be very sensitive, and a few minutes between shoots is a good idea here.
Switching make of bullet, different brands have slightly different jacket metals and/or powders.
When switching loads, fire two rounds off target to season the bore with that jacket material and load residue, then shot group. Sometimes, if this is forgotten the first round and possibly second round will be a flyer relative to the rest of the group, causing you to think the load is bad, when in fact it could be very good .
Hunting zero's are always done from a cold fouled barrel, some rifles can be very sensitive, and a few minutes between shoots is a good idea here.
Switching make of bullet, different brands have slightly different jacket metals and/or powders.
When switching loads, fire two rounds off target to season the bore with that jacket material and load residue, then shot group. Sometimes, if this is forgotten the first round and possibly second round will be a flyer relative to the rest of the group, causing you to think the load is bad, when in fact it could be very good .
