Re-opening this topic to see if anyone has any experience with the cartridge, in particular how does it perform with the light for calibre projectiles, say 100 gr to 165 gr?

In particular how the barrel twist copes with a 105 gr projectile and still is reported as doing well with a 300 gr projectile.

ie the 8.5x63. Not all the discussions on .270's and 7mm's.

Thanks.