Just shipped a couple unique long range rigs, These are two of my custom Raptor XP-100 handcannons. A lot goes into these XPs to allow them to be chambered in pretty impressive chamberings.
6.5mm WSM Raptor XP-100
This Raptor XP is a joy to shoot, even with a 140 gr SST loaded to 3000 fps, recoil is less then my factory stock 221 Fireball XP-100 and no muzzle jump at all. Tested this XP at 500 yards which was really only because I had a handgun scope on it. Hitting 1 moa sized targets at 500 yards was EASY. With a rifle scope mounted on this XP, it would be a legit 1K handgun.
376 Steyr Raptor XP-100
This was the first 376 Steyr firearm I have built and have been pretty impressed with this little 375 cal round. I loaded the 270 gr Hornady SP flat base for testing this handcannon and was easily able to break 2400 fps with mild chamber pressures. I would estimate it would be easy to break 2500 fps with no problems at all. Accuracy was very good. At 500 yards, it was easily holding 1 moa but was not quite as consistant as the 6.5mm WSM. Likely this was simply due to the lower BC bullets being effected by the wind more and also, I will admit this handgun has abit more recoil and that could have been effecting my groups a bit!!!
Recoil is certainly not severe by any means but the very high expansion ratio chambering does not work the muzzle brake as well as the 6.5mm WSM chambering which has hardly any recoil at all.
For heavier game, I would feel confortable using this handgun out to 500 yards easily. The 260 gr Accubond would likely be a better choice and would have been the test bullet I would have used but did not have any in stock and thanks to Washington, bullet supply is a bit thin!!!
Anyway, just wanted to share some pics of a couple Raptor XPs, I really do like building these cannons!!!