>>>>>>>>>>>>Most people use a longer action to seat long high BC bullets further than a short box magazine will allow. So far so good. When you seat a long bullet to extra long overall length an increase in volume is created. With the same powder charge as the standard load there may be space created (that will decrease pressure and velocity). To get back to standard pressure and velocity you increase the powder charge...just to get back to standard performance...of course you can perhaps change the type and charge to actually exceed by some margin standard performance.
>>>>>>>>>>>> No reason not to use a standard chamber in a rifle with a longer action...you may just have the action and want a different caliber...ALL GOOD ! In the old days short cartridges were available in standard actions like a .22 Hornet in a Pre-64 Winchester M-70. Pay 'yer money, take your choice!
