The Mdl. 740 Remington had a problem with climbing after the first shot. The first shot would land on the POA. The seconed and third shot would each hit higher. This was caused by the single pitch screw that attached the forearm to the reciever. Wilson at one time made an Alumn, shim to correct the problem. Remington corrected the problem in the later rifles with a double pitch forearm screw.
The .280 Remington AKA 7mm.06 is a fantastic round. As posted in a strong rifle action it can push very close to the 7MM Rem. Mag. In the Mdl. 740 keep you loads in the Mid range and use a SB FL die. Make sure you keep reloads at the correct OAL. Many of the first and second Mdl. 740 rifles will only keep three rounds in a 3 to 4 inch group at 100 meters. This makes it a 150 to 200 yard hunting rifle.