06 August 2004, 10:09
woliRe: Cartridge Question 7x75R
DPhillips,
if you`re still interested, I found a load data for this cartridge in an old DU PONT brochure in german language! I don`t know, how far the powdwers have changed in the mean time, the brochure is some 20 years old...
Case: Gehmann
Primer: Rem 9 1/2 M
Bullet: Sierra 175 grs
Powder: IMR 4831 61,5 grs
velocity: 2838 ft/sec
barrel: 25.5"
max adm. pressure: 3600 bar (52.250 psi)
velocity at
50 100 150 200 250 300 METERS
2756 2674 2595 2516 2441 2365 ft/sec
Cartridges could still be ordered from Kettner, K�ln in their 2002 catalogue with 140 grs balistic tip and 175 grs Nosler. For 4.50 EUROS EACH!!! The bal.tips had a mv of 3301 and the noslers 2956 ft/sec.
Hope to help you so far...
Wolfgang
06 August 2004, 11:25
ChasseurA couple of my gunsmith friends in France told me some horror stories about drillings and double rifles in 7x65r having probelms because the pressure was too high. Anyone here have any problems with this cartridge in break action guns?
Thanks
07 August 2004, 10:45
woliChasseur,
never heared of such problems. The 7x65 R is the most used caliber in single shots in Germany and if there would have been any problems, one would hear very quick about it. Just remember, what discussions a single Blaser R 93 blow-up caused! The use of .243 Win or .30 R Blaser in single shots with max admitted pressure at around 60,000 psi (4150 bar) and 58,500 psi (4050 bar) should cause earlier some problems than the 55,000 psi (3800 bar) of the 7x65 R.
Just my 2 Ct (Euro-Ct!)

Wolfgang