Anyone deal w/700 Rem w/long throat? New gun, not shot out. Rem do this on purpose?
Working on a friends 700 Rem BDL, 270 Win. Gun's perhaps 4 years old, maybe 5 from date of manufacture. Perhaps 100 rounds down the barrel. Purchased new by my friend.
Groups with factory Rem Corelok ammo were miserable, perhaps 2" at best, off a shooting rest, and with experienced shooters. The trigger is not the best, but the rest negates poor trigger, and to a certain extent scope. Scope is a Nikon Prostaff. Not fabulous, but not crap either....
I "borrow" the gun to hand load something special to remedy the problem. First debate is whether to float the barrel or not. I decide to float. No, I did not bed the action. Lot more work, though I might do that too, if needed. But I contest that floating and/or bedding is not the issue...
I measure the base to ogive measurement using the Hornady Lock-N-Load OAL device (its not really OAL, but that's what they call it) with several common 270 bullets and I am shocked. The throat is at least 1/2" I cannot seat130gr Sierra Game Kings, Hornady Interlocks, Berger VLDs, or Nosler Ballistic tips anywhere CLOSE to the rifling. We are talking 300 thou jump, in order to get at least .277 of bullet (usual recommended min seating depth) in the neck.
This gun has Weatherby style throat. (We are working on his 340 Wby as well).
So I load some Nosler Ballistic tips and some Sierra Gamekings to a pretty random COAL, that put about diameter (.277) in the necks, spread out a test series of H4831SC in each and went shooting. (cases were well prepped, sized down 3 thou, primer pockets reamed, flash holes reamed etc)
Results: Groups were better. But showed no predictable pattern. About 1.5 - 1.75" 3 shot groups. Across both bullets and all powder ranges. Makes me think I have a variable that I am not accounting for.
So a couple of questions and points to debate:
1) In a long throated gun, particularly a 270, does anyone have a bullet that we should try? The magazine seems to be generous -- we could seat bullets longer, but I am running out of neck before I run out of magazine.
2) Why is this happening? I have loaded for many Rem BDL's, including at least one other 270. All had throats that I could measure (some the old way, with a fired case, and smoked bullet, or a lightly crimped bullet). This one is LONG. I have a theory, and it troubles me: The lawyers at Remington said to the engineers; "You need to make it harder to blow up the gun". And the engineers, knowing what sorts of loads are in books and on the internet, said "If we make the gun with more free bore, even excessive charges will never produce dangerous pressure, since it will be impossible to load to the lands". I admit, conspiracy theory. But a couple Google searches reveal we do not have the only long throated BDL here.....
OK, so your thoughts????