I handload and would have not bought the 340's ( they are quality though ) except I couldn't find any 340 bullets anywhere, and though why not give them a try.
I would be happy shooting 1200, and would have even loaded for 1000 but gotta watch the stability. 1400+ is a lot, and the bullet probably would hold together better with less. It's interesting that my first shot moved me back a step with a sharp snap, but my Casull shooting bb 360's at 1400+ seemed like half the recoil, with a gentle push. 340 +P+ are 45,000 CUP. 360 Casull are 50,000 - 55,000 CUP, but the Casull are not loaded to their potential, and no need for that.
The 340's would be my carry choice for protection from critters ( two legged too ) in the woods if I carried my 44. Just make sure the first shot counts, as follow up will be slow, and watch out for the fireball ( I have a 4 3/4" barrel ) because it's HUGE :shock:
btw, a really nice cast bullet imho is True Shot 310's from Oregon Trail. They'll do anything you could as of a 44, and easier on the gun and shooter.