Id also point out , its been my experience that bullet jacket alloys differ between manufacturers,
nosler bullets, (especially the older versions) and some other brands ,in my experience,tend to have a more rigid copper alloy jacket,
that tends t induce more resistance to the bullet initial engagement into the rifling,
this results in a slightly higher chamber pressure before the bullets moving down the barrel.
a load using a speer or hornady bullet may give marginal pressure indicators,
while the same case and powder charge with the nosler might read a bit more pressure
if you use a micrometer to measure case head expansion, you can watch the difference in case head expansion,
as you increase the powder charges a grain at a time while working up loads,
if you don,t exceed factory ammo case head expansion in your rifle you,ll generally be fairly safe
Id also watch primers for pressure indications
Stay well below the maximum charges listed in the manuals, and you'll be much safer without significant sacrifice in down-range performance. No micrometer is a reliable pressure gauge.
but you certainly will see greater case head expansion over the factory ammo if you load to higher pressure levels so its a tool to keep you out of trouble
