7x65R, what uses it?
- Thread starter Chemist
- Start date
It's a rimmed version on the 7x64 Brenneke (the European forerunner and ballistic twin to the .280Rem).
Like many other metrics, there is a rimmed and non-rimmed version (e.g. 8x57JS and 8x57JRS - an 'R' in the named indicates 'rimmed'). The rimmed versions normally operate are slightly lower pressures than their non-rimmed, bolt-gun intended bretheren. This is because 1) Rimmed cases are more reliable in break action rifles like single shots, combos, doubles and drillings (arguable?) and 2) Break action guns are inherently less capable of handling higher chamber pressures than bolt rifles (especially those of vintage when these cartridges were developed).
So....your 7x65R will produce slightly less velocity than its twin, the 7x64 for this reason, in order to keep pressures a tad lower. Not sure if this is totally necessary in modern break-action rifles, unless they are made as svelte and trim rifles like mnay of the continental examples are (besides, who wants a .300RUM in a nice 7lb kipplauf stalking rifle??)
Like many other metrics, there is a rimmed and non-rimmed version (e.g. 8x57JS and 8x57JRS - an 'R' in the named indicates 'rimmed'). The rimmed versions normally operate are slightly lower pressures than their non-rimmed, bolt-gun intended bretheren. This is because 1) Rimmed cases are more reliable in break action rifles like single shots, combos, doubles and drillings (arguable?) and 2) Break action guns are inherently less capable of handling higher chamber pressures than bolt rifles (especially those of vintage when these cartridges were developed).
So....your 7x65R will produce slightly less velocity than its twin, the 7x64 for this reason, in order to keep pressures a tad lower. Not sure if this is totally necessary in modern break-action rifles, unless they are made as svelte and trim rifles like mnay of the continental examples are (besides, who wants a .300RUM in a nice 7lb kipplauf stalking rifle??)
