For what it's worth, I just got a "new" 1943 izzy 91/30 from Big 5 today (Century Arms origin, only a VERY little cosmoline on the rifle, and well cleaned/oiled when it arrived...so I cleaned it anyway...
). First Mosin. Never loaded a Mosin before. Got cheap stripper clips from Numrich (very thin metal, but nice sharply bent corners). Loaded strippers, and loaded the rifle from a stripper perfectly on the first try after reading the articles here about strippers. If you load it the way they tell you to, you will have no problem with the strippers (I didn't even have to tilt up the first round, they just slid right in, with no resistance at all). These guys have solved the stripper clip problem, hands down.
At least the newer strippers out of Numrich are decent, if not particularly sturdy, but at $1 each, it's not a bad deal. The rifle itself was VERY nice, discounting cosmoline in the stock, and a murderous safety/firing pin spring, but the accessory pack was marginal at best. Bayonet had obviously been dragged through several hundred kilometers of rock garden, the cleaning rod handle was too big to fit into the cleaning rod slot, no brush, no rod extension, and the oil can covered in cosmoline got grease on the sling. Still, not bad for $89.
ETA: Maybe pics later. Gotta finish getting the cosmoline lacquer off of the metal protecting the sling mounts.