I would go with the 300 RUM the most out of 30 cal bullets you are mentioning and several people have had issues with bullet seating in the 7mm RUM and not reaching the desired potential. In the sendero line the recoil kick should not be bad due to the weight of the rifle.
Every man needs a good woman, good dog, good horse and a good gun.
Both are going to recoil alot more than your 7mm Rem mag 162gr but a good muzzle brake can tame them down alot to feel less than an unbraked 7mm Rem mag.
The 7mm RUM with the 180gr has a little less recoil than the 300 RUM and 208-210gr, the 300 RUM might be beter if your wonting to shoot large game and the 7mmRUM has slightly beter BC bullets on offer. Unfortunatly factory chamberings in these two cals suffer from having a long throat which can be a problem if your wonting to seat long for best accuracy.
Last edited by Rocky Mountain; 05-17-2011 at 05:21 PM.
For 1000 yard elk out of the choices you have listed id go 300 rum.
The 300 win is a great cartridge, and I'm sure somebody had whacked an elk at 1k, but if that were my goal from the ones on your list.
The 7 ultra is fun, I have shot an unbraked 7.5lbder but it was with 120s over 102g of retumbo. I may have been biased as that morning I had shot the 375 ruger a lot, but it well withing manageable to me.
In most rifles capable of 1k recoil would be easily managed with a brake and the weight associated with the rifle. I will say that the step up in recoil from a 162 a max in 7mm to a 200 grain accubond in a 308 is fairly substantial.
If you are serious about taking big game at extreme 1,000 yards or more, then shoot as much gun as you can handle and with that being the primary criteria, I would suggest the 300 RUM.
Otherwise, of the lot, my pick would be the 300 win mag. The 300 win mag can easily take elk at the longer ranges, recoil is manageable even without a muzzle break and if you don't handload, the selection of ammo over the counter is plentiful.
Last edited by captainjoe; 05-27-2011 at 05:46 AM.