I own a 7600 and browning chambered in 270 win, for deer dandy cartridge. OddlyI have never owned a 700 in 270 win chambering but the 700 is my favorite action. My most favored rifle is a custom built on a 700LH BDL action chambered in a 7mm rem mag, from yotes tomoose not a problem.

BTW all my rifles and ml wear aftermarket pads. Most are pachmayr's but I do have a couple with the SIMS. The SIMS does a better job at reducing the recoil but themake up of the padis a little grippy and not as durable as the pachmayrs. Both are good products and work to reduce felt recoil.

As to adding both unless you need more length in the pull you'll have to trim the stock to accept a fitted and a slip on pad. I really don't see the need for such a procedure though, even with a bummed shooting shoulderI can plink in a T shirt with no adverse effects.