That is a test of friendship - I know. I shot my mates one! Bullet disintegrated and took it out. Replaced the broken screens, (from Oehler) but he was a bit frosty even so. He sold me the bullets too. Some very old ones. I have my own Oehler now, so that's solved that problem.

Every time I set up a rifle to shoot from it I (1) sight alongside (or through) the barrel to make sure it will clear the screens and (2) on the Chrony I used electrical tape on the wires so that, I could be sure the telescope reticule bars were above it and hence the bore was high enough to clear.

Anyway, that velocity figure of mine is quite high, only with that powder. If you're getting 2,100 - 2,200 fps, that should be quite OK.

Post war rifles, from early 1950's were aimed at the American market and so the bore size is more likely to be .264" in these. So proceed with caution and don't use oversize bullets in these - or any rifle without measuring the bore first with Cerrosafe.

Have an awesome hunt.