[Organic]

I’ve read here and there that one should consider using a heavier recoil spring if the intention is to shoot +P ammunition. The spec sheet for my Kimber UC II states that my stock recoil spring is rated at 18 lbs. To avoid a wall of text I’ll enumerate my questions below.

1) Is 18 lbs sufficient for very occasional use of .45 +P ammunition, or should I go ahead and step up to a heavier spring?

2) The recoil spring assembly incorporates two separate springs, but I have only seen outer springs for sale. Am I correct in my assumption that the outer spring is the only one that needs replacing, or have I simply missed something?

3) If I do change to a heavier spring, be it just the outer or both inner and outer, would there be any necessity to revert to a lighter spring when firing standard pressure rounds?

Thank you in advance for suffering my ignorance. Handguns are a new beast to me and I clearly have much to learn.