If you are going to shoot top end loads, I would suggest Wolff Gunsprings.
They make them for the P series Rugers. Here is a link.
https://www.gunsprings.com/RUGER/P%20Series%20Pistols/cID1/mID52/dID220#268The old P90, while not a beauty queen was really a very accurate , and quite reliable pistol. If I found one at a low price in a pawn shop or wherever, I would probably buy one just to shove in a pack, or stash away some place. They were quite under rated in my opinion. A friend of mine had one we compared it to our 1911s we were running in USPSA at the time, and it was every bit as accurate as some match grade guns.
