I've been shooting the .376 steyr in a Steyr pro-hunter with a 20" barrel now for almost 6 years. Have dies and 250 pcs. of brass so I should be fine.
I've used it only for whitetails in thick brush with the hornady 225 gr. sp interlock. I'm shooting a reduced load of IMR 4895 which send the 225 gr. at 2400fps more or less. accuracy is reasonable, 1" to 1 1/2" at 100 yds. In the light pro hunter, it's not exactly a gun I want to spend a whole lot of time on the bench with. In a heavier gun it would be alot more pleasent, but would defeat my purpose for the gun, long hikes in steep terrain and shots under 100yds in thick brush. With the reduced loads, there is less meat damage than a .30-06 with 150gr. Noslers and when hit, they go straight down. I've not had a deer run more than 10 yds. For my purpose, I think it's ideal. Short, light gun, big heavy bullet, leupold 2.5-8X in talley qd rings with great open sights if needed. I love the featurs of the steyr too. Removable spacers in the butt to adjust length of pull depending on how many layers you're wearing, great open sights, you can click the magazine in just below where they feed, nice 4 position safety. I could do the same thing with alot of other cartridges though, .350 rem. mag., 358 win., .35 whelen, etc... come to mind, but for me it's an ideal total package of rifle design and features + cartridge/ballistics. If I ever have the need, I can also move up to the full house .300 gr. loads and kill most creatures that walk this planet, anything that walks North America.
If anyone has some reloading info they'd like to share, I'd be happy to share the loads I've came up with for the .225 gr. bullets.