I currently own two .22 semi-auto pistols (Walther P22 and ISSC M22). On the M22 (SA only) there is a decocker and when decocked it brings the hammer to the half-cocked position. On the P22 (SA/DA) the hammer also rests in the half-cocked position. My question is, is it ok for the hammer to rest on the striker? Will that wear out the striker spring? Or should it always be in the half-cocked position? Thanks.