Most barrels chambered for the .303 Savage are .308" groove diameter but some are as large as .310" requiring the use of .311" bullets.
Barnes 225gn TSX at 3016fps dropped running moose in mid-stride. A 220 grainer at 3200fps can reach way out yonder for deer.
When this seal begins to fail (flow), it is a sign that you've reached a maximum load.
Pushing the switch forward to "Fire" completes the circuit, allowing electricity to flow from the battery through the safety and to the trigger.
Could you suggest a powder and loads for my 1886 BSA Martini-Henry Mk III in .577/450?
I owned a Mauser rifle in 9.3x62mm for many years and used it successfully hunting in Canada.
The 122gn Soviet round has a muzzle velocity of 2340fps and energy of 1483 ft/lbs
I never found it necessary to crimp case necks as long as neck tension on the bullets was sufficient to resist recoil.