30 Cal. C.O.L. issues

[hvychev77]

So, i have a Remington Model 700 that appears to have a fairly deep throat. I'm new to anything aside from SAMMI standard overall length for bullet seating. I purchased a Hornady COL gauge. It worked great on my .308 and proved out that i'm setting my bullets at .015" off the lands/grooves, which shoots super accurate for a factory rifle. The problem is when i purchased the modified case for my Remington Model 700 chambered in 300 Win. Mag. to see where i'm seating my bullets at for accuracy reasons and I found out that to touch the lands/grooves my bullet would seat at 3.560". Is this too deep or what do you folks think? it looks really freakin' weird to set a bullet just a few thou' off the lands here. I'm thinking the throat is way too deep. What do you fellow reloaders think???? hvychev77

 

[gamestalker]

What bullet?

And ya, that sounds awfully deep throated based on a couple Rem. 700's chambered in 300 WM I currently load for using Speer 165 gr. Hot Cores and PSPBT. And Hodgdon shows a tested 3.340" for a 165 gr. Speer SP, so 3.560" sounds kind of long, considering that's more than .2" longer? But unfortunately, I don't measure OAL, I measure the seating stem to mouth of the die, or use the competition die, of which neither correlates with actual OAL measurements. Sorry I can't help.

The way I do it, I seat a bullet long, chamber it by hand with the bolt removed, and when it just barely sticks in the lands, and can be bumped loose by tapping on the barrel, I then know it is real close to zero. Then I start seating in .001" increments until it doesn't stick at all, that's my zero.

In other words, I guess you could say I use good ol plunk testing, well sort of? But as for fitting the magazine and all, I haven't had any issues with them all the way out to the lands, and then some.

GS

 

[rcmodel]

Lots of modern Magnum rifles have a lot of free-bore in front of the chamber to reduce the risk of excess pressure.

(First started by Roy Weatherby just after WWII.)

Remington is guilty of it too.

It is unlikely you can seat long enough to reach the rifling leade and still fit in the magazine.

rc

 

[hvychev77]

Thanks fellas. That's good info. to know that they do that in modern rifles to reduce the risk of over pressure. I was concerned, but wasn't concerned. When i first measured it, i was fairly surprised to say the least. However, this gun shoots very well so, i figured that I would just keep doing what i've beenn doing which is loading to the standard 3.340" using a good 'Ol Nosler Accubond, 180 grain. Thanks again.