As previously stated, the long action is the one you want. Barrel channels are different between LA non-magnums (30-06, 270, 280 etc) and LA magnums (7RM, Ultramags etc) so you may have to open up the channel just a little. If you have the option ask for a "Remington magnum barrel channel/contour." The stock should be a drop-in without any mods needed.

RH