Winchester Supreme once fired Cases

I recently acquired 40 once fired Winchester supreme cases. as you know, this is the Chrome colored cases. I resized the same as brass, trimed to length. reprimed, reloaded with Winchester 780 Supreme. I topped it of with a 100grn sierra BTSP. I also loaded some brass with 117grn. Hornady SST. I went to shoot at makeshift range, several of us use. I had a serious problem with the Chrome stuff. It wouldn't load into chamber. No problems with the once fired brass. All of it was trimmed to same length. I'm shooting a 25-06. When I stuck the first one into the chamber, I actually thought I already had a round in it. It went about 3/4 of the way into chamber and just stopped. I wouldn't try to force it. I shot about 50 rounds of the brass reloads with no problems. any one out there have a clue. I certainly don't. well I guess I can pull them down and throw the Chrome stuff in the bad brass bucket.

I have the same opinion. This is not a new topic though and opinions vary.....

Did you full-length resize?

Yes Sir, I did. Before I pulled it down, I measured it everyway it could be measured. The case itself was identical to the brass that had no problems chambering. The first round started into the chamber and just stopped like it had hit something solid. I tried it several times and it would do the same thing. I just moved on to the Brass rounds with no problems. I pulled them down this afternoon and threw all 20 of them into bad Brass bucket End of problems. the only 2 things I can think of I tumbled it prior to loading, why, just habit. The other thing I noticed, was COL. It was several thousandts shorter than the other rounds. I had 40 rounds with a Hornady 117 grn. SST and 10 rounds of Sierra 100 grn. BTSP, I wonder if maybe the runout on the bullet was out of whack. I don't have a concentricity gauge. That was the only round I tried to load. I feel if it was that for out, I would have seen it with the naked eye.

Robert