Ditto to what Alfonzo and others say. The 41 does fine with anything that feeds O.K. You will not damage the frame or slide with .22 rimfire ammo. No need for a buffer, but one certainly does not hurt anything. Remember that the high velocity loading does it by using a rather light bullet. The recoil impulse is all that the gun "feels", and with light, high velocity bullets in the 30+ grain range, it is about the same as with the standard 40 grain bullet at 1040 to 1150 FPS.
It appears to me that the main reason for these wonderful "high velocity" light bullet loads is that they generate an advertising benefit and cut down on the amount of (expensive) lead used, increasing the profit margin. Light, high velocity .22 rimfire bullets do nothing good for us, the users. They are inherently less accurate, have less range, poorer sectional density, higher trajectory, and I sense that they may be more prone to feeding jams...especially the hollow point versions. I'd like to see reasonably priced 40 grainer high velocity bulk pack ammo widely available again, but it looks like the fix is in...not to have it available.
You can play around with custom springs to make the 41 digest just about anything. But ctg. dimensions, especially rim diameter, must be on the button, or you may get jams, no matter what spring is used. And the magazines must be right. I would not use an aftermarket mag in a 41, although some may be just fine.
The only improvement I would make on the 41 is that there should be a few thousandths more clearance on the underside of the barrel extension, to minimize ejection jams. I guess an owner could have this done. And there might be some changes in extractor design, also to improve reliability. But this is one of the finest mass produced .22 rimfire pistols out there...ever...in my totally biased opinion.
