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I have loaded several FMJ RN 230 loads with no problems in my Kimber. Tried a few Rainier 200 TCJ SWC and had a couple of jams with the bullet jammed into the leading edge of the feed ramp. I used Bullseye 5.6 gr per the Midway chart on the Rainier wedsite. They list that as a starting load.
 

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5.6 of Bullseye is kind of hot for a starting load. Sure that wasn't a max load, or a typographical error?

SWC's hanging up on the feed ramp can be caused by an overall length that is too short. If you are loading to less than 1.25", try that length and see if it helps.

I polish the feed ramp and breech face, but am not sure it is really necessary. It may help.

An improperly adjusted extractor can contribute to feeding problems. Search the previous posts in the pistolsmithing section for info about that.
 

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My Kimbers are a little sensitive to OAL. I try to keep both FMJ and SWC OAL to a maximum of 1.245" I also run a 18.5# recoil spring. Do not load Bullseye, so can offer no help there.

------------------
John

"And by the way, Mr. Speaker, The Second Amendment is not for killing ducks and leaving Huey and Dewey and Louie without an aunt and uncle. It is for hunting politicians like (in) Grozney and in 1776, when they take your independence away".
Robert K. Dornen, U.S. Congressman. 1995
 

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I have the same problem, it only happens on the first round. It makes no difference whether I rack the slide or let it drop from the locked position. After the first round in each Mag it does not happen under fire conditions. My all lead bullets work fine but the copper plated jam. I am not sure of the OAL at this time, but after reading the above posts I will be checking it next time I load.
Keith
 
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