I was plugging the 180gr Berger VLD's into a ballistic program and realized if you can launch them at 3300fps+ they absolutely outshoot anything 250gr and under in any caliber bullet. Now for the cartridge to push it: 7mm RUM (is this the same case as the 300RUM, or would the 300RUM necked down be advantegous as in case w/ the .338 edge?) .284 Norma Mag, based on the .338 norma case, necked down to .284, should yield roughly 97gr case capacity 7mm Allen Mag, based on the .338 Lapua case, should be very samiliar to the Norma mag, accept in long magnum format (of coarse w/ these large sums of powder being burnt, I realize the need to a high quality 28-30" tube) Anyone have expierence w/ these cartridges? how about highspeed 7mm barrels? the 180gr vld Berger bullets? I know Nathan Dagley is planning on building the .284 norma, I am looking forward to that! Any HELP would be MUCH apreciated, thanks guys.