I have bought a lot of guns over the past 15-20 years. And here is what I notice. Especially with Remington 700's. 700's made before 1990, it was not uncommon to be able to hit the rifling and be under max COL and be able to put in your mag. And over the years, it has gotten progressively worse. I don't have one rifle made past 2000 that I can hit the rifling and be under max COL, and be able to fit in mag. Shoot, take out being under max COL, and I still don't have one from 2000 up.

Most rifles will shoot underpressure with long throats. I believe its a safety thing. Some rounds require long throats. Like the 300RUM and the 7mmSTW and especially the weatherbys. If you get a 300RUM barreled and reamed so you can touch the rifleing under 3.6" COL, you most likely will not be able to to shoot factory ammo. I actually knew a guy who requested this, and he cannot load to most mfg. max recommendations.

I have a 1980 700 7mm-08 varmiter. Most accurate gun I got. I can touch the rifling at 2.74" with most bullets. Thats over .06" shy of SAAMI specs. My new 204ruger, the bullet would fall out before hitting.