I have been shooting a factory remington 338 lapua. I just received my custom 338 lapua with brougton barrel. I thought I could use the same load for both rifles but the rounds I have been using in the remington will not fit into the broughton barrel. Will full length resizing fix this or do I need to have separate brass for each rifle? Is there a possibility that my new rifle has an issue? I don't have a FL resizer die or any new brass to try out.