My reloads in Ruger and Kimber

[TMD]

If it works with factory ammo and chambers your reloads then you are probably light on the powder charge. The other gun may have lighter springs that make it more reliable with a wider variety of ammo but this may cause premature wear with heavy loads.

^^^This^^^

From what you describe my money is on your Kimber having a heavier recoil spring.

 

[745SW]

I've had three, brand new, Colt Gold Cup series 70's, they will run with a low charge of fast powder. I load the 45ACP cart. warmer to function in all my 45autos.

 

[Stevie-Ray]

I've used 4.0/Bullseye/200 LSWC in .45 ACP as a plinking load and it almost always operates in whatever 1911A1 or other auto I use it in.

Wow, my pet load for practice was 4.9/Bullseye/185 LSWCs in my pin gun, and I had to use a 15 lb spring.

Spring's too heavy on the Kimber, would be my guess.