P-12 purchase
I am one of those who has had nothing but good experiences with the P-12 (a lightweight and a steel frame) and three Officers' model Colts and a custom built OM. No horrific experiences and I would buy/build another tomorrow.
That said, There is a mod that I always have done that makes me feel better, anyway: Any qualified gunsmith can do it, but because they are the suppliers of the parts needed, I will mention Kings' Gun Works, EGW, Ed Brown or Wilson Combat.
The mod has three steps;
1. Replace the recoil spring plug provided (held in by a small tab that fits in notch on dust cover) with full flange reverse plug and full length guide rod; Wilson Combat, Ed Brown, Kings and EGW make parts for this. This will involve filing down the back of the dust cover to the depth of the flange: EGW uses a collar system cut with a mill.
2. Replace stock bushing with match bushing, which will require fitting.
3. Barrel to be turned to match inner dia of bushing.
Can't mix and match much on this, as width of flange is somewhat matched with thickness of match bushing. Kings' is probably strongest, EGW has better contour match with slide (s'purtier) WC and EB used to market a bushing to go with their replacement guide rod set; EB claimed his was stronger than stock. (Required some fitting).
Match bushing and barrel fit should help accuracy too, though I never had a bad experience that way either. Its' just that the stock plug has some reputation for weakness in the one tab.
Yeah, I Know there are many that say don't trust anything shorter than a Commander; I don't agree with them.
Think about: Smith and Alexander mag well for PO: P12 is just a bit shorter than OM length grip. I Have always liked the way the gun feels with this heel only style mag well to give a bit more of length at the back, while being no longer than the grip is with mag in place. It just fills in the area behind the basepad and spreads gripping surface a little better over the meat of your hand. No longer than OM.
Real PO High caps are still available; I used to like to swithch out the mag springs with Wolffs too. I have seen them for around $40.00. Another option (if you're going to change the springs anyway), is to buy tubes (maybe P-13,14?) from Dawson Precision and rebuild your mags.
Cheers, TF