Excessive throat in R 700

[30378]

Just bought a brand new Remington 700 in 300 Win Mag. Every reloading manual I look at shows a max OAL of 3.340". Just checked my chamber and with 180gr Nosler Accubonds they just touch the lands at 3.644". I guess it is a different ogive but 165 Accubonds touch at 3.672" OAL. My question is what would you use for a starting point on seating depth with a chamber throat that long? How far out would you go? The spec length seems meaningless with this rifle.

 

[DIBBS]

I think you'll simply be limited by magazine length as far as COL. I try to minimize jump to the lands, but each rifle is different. I would load so they just fit in the magazine. FWIW I have an older .308 VSSF that ihass a long jump to the rifling, but it shoots good, darn good.

 

[30378]

Magazine wall to wall is 3.7" so I think I'll start 3.60" and see what happens. Got to start somewhere!

 

[DIBBS]

OAL/COL really only matters as far as what will work in YOUR rifle. There may be an industry standard for loaded ammo, but as you well know each firearm is different. I've had good luck with RL-22 and H1000 in my 300 WM

 

[people]

Load testing will tell you what your rifle will like. I would start at just short of mag length if you want to use the mag.

 

[ScottMcc]

Interesting, I wondered why specified max length was so short too. I have a 700 in .270, and I was surprised how far the freebore went. I tried to get within .020 with 130 grain sierras, but they were barely in the neck for my comfort. 140 sierras reached OK but were then too long for the magazine. No need for f open accuracy, since Im not going to shoot at a game animal much past 300 yards anyway.

 

[Rustystud]

The 300 Win Mag was designed to shoot in a model 70 Winchester with a 30-06 length mag box. The Remington model 700 is much longer than the Model 70 action and allows more seating room than the SAAMI spec.
Nat Lambeth