RESSURECTING the .270 Wea Mag cases from 7mm RM...

[dmjhwk]

Having resized from 7mm to .270 Wea Mag-and probably looking at too many sources of info-my question is is there a noticable accuracy difference during the fireforming vs already formed cases?I have loaded a few w/67grn H4831/130's,72grn same w/90 grn HP's- definately on the low side, and 60grns H4350/150's.Also, I've seen some info that using this method, vs, a fast powder w/packed granular medium(cornmeal, etc) with no bullet, will result in short cases? The necks are just a wee bit shorter than Weatherby after a few runs through the dies-but well over caliber dia. in length-it seems that they would try to flow forward a bit using the bullet ???? Any suggestions/advice/experience in this would be welcomed.