[quote="Brent"]For the upcoming southern L.P. opener I bought a box of 3.5" Remington Hypersonic #2's and #4's.]/quote]
You n abd your shoulder, have my condolances!
I tried a box last year. The didn't pattern well for me, but I didn't test them in a lot of different choke tubes. I did a comparison of them with a similar load of Kent and found the Kents to perform better. The recoil was not so much bad (it was noticably stiffer than the Kents), but the way the bolt slammed back against the receiver gave me some concern. I have heard of (unsubstanciated) claims on the internet of these loads doing damage to the receivers in some guns. Can't say for sure, but my experience was enough not to take a chance.
Lastly, after a little research, I'm not quite sure the technology iw ready for prime time. The whole idea is that a small charge is ignited by the primer, which causes the load to move forward slightly in the hull. This in turn, exposes and ignites the main powder charge. However, if the wad begins to colapse instead of moving the charge forward, then the charge is still fully contained within the crimped hull. Then, when the main powder charge ignites, it still needs to overcome the crimp and the inertia of the load. In other words, if the wad collapses, but the charge of shot doesn't move, the pressure will build to levels beyond SAAMI safe working pressures. Now, Remington knows that American gins, and to a lesser extent CIP approved guns, are quite a bit stronger than the SAAMI pressures. In the case of American guns, the proof load can be double the working pressure. And, even though CIP guns are not proofed that high, they certainly are capable of withstanding those loads. But, the problem is not a single over load. The problem is repeated overloads that can and do cause fatigue and failure of the moving parts.
Just my opinion.
I feel slightly sorry for a man who has never patterned his gun, who has no idea how far his chosen load will retain killing penetration. But I'm extremely sorry for the ducks he shoots at beyond the killing range of his gun and load - Bob Brister