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Bart B. · November 20, 2013, 11:32 AM

I would trust Pressure Trace for the best numbers comparing load recipie A to B in a given barrel. That includes all the rifle's stuff to cause pressure albeit not what the same load would probably show for pressure in a SAAMI spec barrel and psi system. Quickload doesn't include inputs for all the rifle's stuff that impacts pressure numbers, most of them it does.

Not many folks know why the .270 Win's pressure's higher than the .30-06 using SAAMI's specs. Once folks realize what factory barreled actions there are out there for each and when each round was first used, they may observe that some of those for the .30-06 are a bit weaker and don't support the case head as well as those for Winchester's 27 caliber round.

November 20, 2013, 11:32 AM	#17
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	I would trust Pressure Trace for the best numbers comparing load recipie A to B in a given barrel. That includes all the rifle's stuff to cause pressure albeit not what the same load would probably show for pressure in a SAAMI spec barrel and psi system. Quickload doesn't include inputs for all the rifle's stuff that impacts pressure numbers, most of them it does. Not many folks know why the .270 Win's pressure's higher than the .30-06 using SAAMI's specs. Once folks realize what factory barreled actions there are out there for each and when each round was first used, they may observe that some of those for the .30-06 are a bit weaker and don't support the case head as well as those for Winchester's 27 caliber round. Last edited by Bart B.; November 20, 2013 at 11:37 AM.