I have a couple of very nice old Walthers. A West German PPK/S .380 and a Pre-War (Zella-Mehlis) PP in .32. I went out and got new Wolff recoil springs and since, I've had some fairly regular failures to feed all the way with full mags. The rounds are on their way in but they've hung up. After the mag is down to 4 or 5, it runs fine. Can I work under the assumption that the new springs are stiff and the slide is not going all the way back due to the combination of spring pressure AND pressure from beneath? Neither gave me much trouble before the spring change and of course I am thinking of changing back. Neither is an EDC at this point but I'd like to consider the PPK/S for same.