Replacing the rebound spring and/or the hammer spring will allow the spring(s) to absorb the greater force exerted by the hotter ammo, but I'll ask why you'd want to. Standard velocity .22 ammo is pretty easy to come by - basically anything around 1080 fps., and sometimes it's cheaper too. Most often, it also more accurate. You don't need to buy $10 a box Ely, CCI standard velocity seems to work very well in these guns.

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So many S&W's, so few funds!!