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Peterd
02-01-2015, 05:58 AM
Hi Guys and girls, I just bought a 300WSM with 250 shots through it.
It's a Border barrel in the more expensive end, and that's one of the reasons to why I bought it.
A friend then handed me a borescope, and this is what I found. The lands is burned to some extend, and yes 300WSM is a powerful round, but is this supposed to look like this 250 shots out?

I've just shot it, and it shoots super good! I'm just worried about the burned lands...

JerrySharrett
02-01-2015, 08:20 AM
Welcome to the world of SuperMags. Any cartridge that burns that much powder is going to be tough on barrels regardless the barrel brand.

In those SuperMag cartridges the average GI is probably only going to shoot one of them, maybe, maybe, 50 or so times in the owners lifetime for 2 main reasons, 1) cost of the ammo, and, 2) cost of the shooters sanity taking that much recoil!!
,

Boyd Allen
02-01-2015, 10:42 AM
First of all, the barrel needs cleaning. Yes there is some heat damage right at the beginning of the rifling. One of the things that shooters may fail to understand is that the pace at which rounds are fired has a lot to do with this sort of thing. Having said that, I would not expect to see what you have after only 250 rounds if the shooter had paced himself so as not to overheat the barrel. It may also be said, that shooters have been known to underestimate the number of rounds that they have put through a barrel in discussions with a potential buyer.

Joe Salt
02-01-2015, 12:38 PM
Jerry you are a sissy! They don't recoil. peterd like Boyd said CLEAN IT FIRST. Then see if it still shoots.I've got barrels with a lot more rounds than that with fire cracks that still shoot. Never know you might have one of those HUMMMMERS.

Joe Salt

JerrySharrett
02-01-2015, 01:19 PM
Jerry you are a sissy! They don't recoil. peterd like Boyd said CLEAN IT FIRST. Then see if it still shoots.I've got barrels with a lot more rounds than that with fire cracks that still shoot. Never know you might have one of those HUMMMMERS.

Joe Salt

Ok Joe, I'm a wuss. In the some 12 years I shot big bore handgun silhouette I was averaging some 10,000 rounds a year much of it 44 mag and 35 Rem in a pistol. Then 10 years of ATA trap, all 12 gage...none of this sissy 28 and 410 skeet. Before that much 50 cal mg where I was a TC. Then AMU and NRA Bullseye/2700 a few years. Actually, the 6PPC in a 10.5# rifle is what made a wussy out of me I guess!

(I've got an old 700 Varmint Special that looks like it was last cleaned by Rotorooter and it still shoots in the mid 5's for 3 shot groups) (and that is at 3,800 with 39 grains of RL-11)

.

Joe Salt
02-01-2015, 02:32 PM
Jerry just busting on you I know you shoot at lot, probably more than me. When I was in my teens I use to look for the worst kicking gun I could find, like 10 gages and even 460 Weatherby. I always like it when people would say how that thing will take you off your feet! I'm still looking for that one.
Peterd have you cleaned that thing yet, want to hear how it shoots.

Joe Salt

Peterd
02-01-2015, 03:43 PM
Perhaps you two guys should get that ruler out, and get i over with ;)

I have run 4 dry tampons through it, and here the first time I shoot it (it landed this weekend..) it shoots like a tacdriver!!

BUT I'm worried that the burned out lands, will build up and change the ogive, or worse, start tearing the bullit up, before it starts to spin in the bore.
And that is kinda the question..

Another thing, it ejects shot empty casings fine - but some live unfired rounds, it will not eject! They don't jam or anything, just won't pull them out.
Taked to the guy who sold it to me, and he offered pickup, cutting a new chamber, and making sure it works before getting it back.

SO now I have the opportunity, to get a complete new chambering - and what would be the absolutely best way to do that?
I'm thinking from a technical point of view, is it just cutting the new chamber, letting it run "right into" lands?
Or cutting lands in a 45 deg. angle, so they don't burn so easily or what would be the PERFECT way to go about it?

Peterd
02-01-2015, 03:46 PM
Just for info, I'm using a BR Reflex T8M silencer, on this and my 20" 308 heavy barrel - the 300WSM both sounds, and kicks under half of the 308...!

Peterd
02-01-2015, 03:50 PM
Jerry you are a sissy! They don't recoil. peterd like Boyd said CLEAN IT FIRST. Then see if it still shoots.I've got barrels with a lot more rounds than that with fire cracks that still shoot. Never know you might have one of those HUMMMMERS.

Joe Salt

What is "those HUMMMMERS" ?

JerrySharrett
02-01-2015, 04:33 PM
If it is shooting well enough to suit your needs I wouldn't mess with it. The ejection problem may be, if you are shooting factory ammo, that the bullets of that load combination may just be too long for that chamber especially if it is a custom chambering.

One caution, if you attempt to use a cleaning rod to assist ejecting a loaded round, never, never, never take your hand off the rod while it is still in the barrel.

Sounds like you have found a shooter.

One bad feature about bore scopes, they can mislead you as to if a barrel really is a shooter or not.

As to Joe and I we just like to banter each other.

Joe Salt
02-01-2015, 05:43 PM
Pererd Don't do a thing to it till it doesn't shoot anymore good groups.

Joe Salt

dk hunt 14
02-07-2015, 03:33 PM
Looks to me like it has a lot more then 250 rounds. I have shot 300 WSM for 7 years in 1000 yard BR. I have guns that have over 1100 rounds through and they don't look like that. The WSM is not as much a barrel burner as you think. The throat only moves a couple of thousandths in 1100 rounds.
We also dump about seven sighters of which are 3 are shot in the last minute and then shot 10 records in a minute or less. Not exactly easy on barrels shooting that way. The throats on my guns just don't move. The firecracking I get is like little fine lines and not the deep craters I got with the 308 Baer which would move as much as 25 thousandths with 350 shots. Matt

Dick Grosbier
02-07-2015, 09:48 PM
it shoots like a tacdriver!!?

Don't mess around with it too much , you just might cure it of being a "tack driver".