i went to the range today to play with the 505 Gibbs before i send it back again (see
http://www.africahunting.com/threads/montana-rifle-company-dgr-505-gibbs-review.17055/). but man that 505 Gibbs sure packs a punch, i love it!
i was shooting three different factory loads Kynoch, Norma, and Corbon. the Kynoch loads are noticeably lighter then the other two which mirrors what ive read online. a couple different reviews ive seen clocked Kynoch Gibbs ammunition at only 2150 fps rather then the stated 2300 fps. i definitely prefer the Norma ammunition to the Corbon simply because the felt recoil is slower and easier to roll with. the Kynoch stuff is outright pleasant and feels like just a slightly harder push then my 416 RM. the Corbon had sharper harder recoil which will take some getting used to.
Kynoch: 525gr Woodleigh SP at roughly 2150 fps
Corbon: 525gr Barnes TSX at roughly 2300 fps
Norma: 600gr Woodleigh PP at roughly 2100 fps
i was only able to shoot 4 Kynoch, 3 Corbon, and 2 Norma cartridges before my gun began to let out (see other thread). also, took my new camera to the range and took a video of me sending a 600gr Woodleigh down range. dont mind my half dead look, i was having a lot of fun but had been up late the night before drinking and playing video games...
-matt