lgm270,
I have 3 Remington 700s with long throats, though they came that way from the factory that way:
700 Titanium .270
700 CDL .30-06
700 Classic .35 Whelen
I seat all 3 to .03" from the lands. For example, the Whelen, with 225 Nosler BTIPs has an OAL of 3.49". I have never tried to exceed normal velocities with the listed calibers by increasing powder charges. I also used to have a 700 .270 with a throat so long, I couldn't seat a 130 gr bullet in the case out far enough to come near the lands. I don't know if it came from the factory that way or not as I shot it a lot loading to the canneleur on Hornady bullets and many rounds were down the barrel before I got sophisticated enough in my reloading to match OAL to the individual rifle. Incidentally, even with the very long bullet jump, that .270 was ridiculously accurate with pretty much anything I ever tried in it.
I am personally not a big 7mm Mag fan either. Nothing wrong with the round, just for medium game, I am pretty happy shooting a .270 or .280. The 7 mag(s) may be more gun for larger game, but it does not kill deer sized game any better, at least out to beyond 400 yards from what I can tell. Not that the 7mm Mag is not more powerful, just that something along the lines for a .270/.280 is powerful enough to be devastating on deer within those ranges and a deer can only be so dead. If I need more gun, I generally jump to a .30 cal magnum. I can see how a 7Mag is attractive to a 1 gun big game hunter though. I have read several reports that the factories and loading companies backed off on 7mm Rem Mag velocities because it suffers from pressure spikes. The lower velocities/pressures, keeps the pressure spikes under SAAMI limits for the round.
Regards,
Lou
