turrning a 300 Rum into 30-378 wby whats needed

[b23]

True, not a great deal of difference but I still go 338 Edge with extended mag box over 338 RUM because I never see 338 RUM brass for sale.  I'm sure it's out there somewhere and 300 RUM brass isn't overly plentiful but I see it once in awhile versus never for the 338 RUM and you can get 300 RUM Bertram brass from Shawn at Defensive Edge when he has it available.

[257wbymagkiller]

I think i will do a benchmark barrel and probably a vais break, the stock will be on its way to CDI for the DBM install, HMMM trigger now 

[Biggerhammer]

I think i will do a benchmark barrel and probably a vais break, the stock will be on its way to CDI for the DBM install, HMMM trigger now 

 

[JJB11B]

man I wish I had the capitol for such a project. What kind of barrel life comparison for 300 ultra and the other mentioned projects? .338 Edge sounds like it would be nice for reaching those coyotes 800 + yards out there

Financially would be my best bet....Closest thing I can get to the .338 edge?

[mountainman]

FWIW, if you want something that is a bit of a hot rod, do not buy the Accumark in 30-378 or 338-378.  The barrel on both is the weak link, it's not only to short but is also to light weight to see any real performance out of either of these two cartridges.  I had one, a 338-378, and whenever you try to throttle them up, the groups opened up and the more you try and stand on the gas the worse they get. 

It really sucks to have all that case capacity, like the 378 has, but you have to shoot it at speeds the same as a 338 RUM or you get groups that look like a shotgun pattern.

If you hang a Sendero size contour of at least 28 inches, not including brake, with a match grade chamber from one of the many top tier barrel companies, Benchmark would certainly be a good choice, and you have a whole different animal but in the factory barreled rifles like the Accumark, not so much.

yes, hit and miss. Owned both, and guess I was fortunate. Both were very accurate shooters! Others though not so good. And love the Edge. Have owned and or shot dozens of them, back before most had even heard of the round. Inherently accurate when built by Rbros, Carlock, or Benchmark. But the Weatherby outclassed it in an accurate Accumark if you get a good one!

[mountainman]

man I wish I had the capitol for such a project. What kind of barrel life comparison for 300 ultra and the other mentioned projects? .338 Edge sounds like it would be nice for reaching those coyotes 800 + yards out there

Financially would be my best bet....Closest thing I can get to the .338 edge?

dropped several coyotes just shy of 900 yards. Yes, it works nicely 

[257wbymagkiller]

man I wish I had the capitol for such a project. What kind of barrel life comparison for 300 ultra and the other mentioned projects? .338 Edge sounds like it would be nice for reaching those coyotes 800 + yards out there

Financially would be my best bet....Closest thing I can get to the .338 edge?

As far as barrel life IDK i have about 300 ish rounds threw mine and shes atill holding great groups, id think its about the same as all the other magnums around 800 to 1000 depending  not 100% though

[rbros]

You won't be disappointed with an edge.  I build a lot of them for guys. Accurate and forgiving. 

[257wbymagkiller]

You won't be disappointed with an edge.  I build a lot of them for guys. Accurate and forgiving. 

Im sending you a PM about possible build 

[mountainman]

You won't be disappointed with an edge.  I build a lot of them for guys. Accurate and forgiving. 

Im sending you a PM about possible build 

You won't be disappointed! He built my first one! Broughton barrel
Defiance action
Manners stock
Jewel trigger
DE brake
Extended mag
Seekins 20 rail a integral lug mortise

Full customs builds guarantee a level of accuracy often not found on semi-custom jobs. At least  that has been my experience with having many of both. This particular build from Travis keeps 300gr. SMK' s or OTM's in a tight, should I day very tight cloverleaf at 300 yards! 100Yards? Rarely waste the time, but when it is shot at that range, one single hole. Give Travis a call. And there are many on this site shooting his rifles, hunters and competitors both!

[Biggerhammer]

Whoever you choose to build it, stay with a Benchmark barrel. Their .338 barrels are well known for their accuracy.

Shop around and do the math any gunsmiths name that's worth repeating on the Internet can true a action, chamber, thread and crown a barrel.

It can be tossed in most any chassis or stock of your choosing. I prefer to send my smiths all of the parts. Barrel, action, stock, brake etc.

Then I know exactly where I'm at $$$$! Wise for his work. Numbers get real inflated often when you just send a action and leave it to a smith.

When you have had enough rifles built. $3500 for a Remington 700 based custom in a McMillan tactical is out of the ball park. Some of us actually know how long it takes to do the metal work.

Benchmark has supplied the 30" barrel, trued my action, chambered(.338 Edge) threaded, fitted , bead blasted and installed a muscle brake and returned it to me for $900.00. Add the cost of the stock and bedding and look where your at NO where near $3000.00 plus. If a guy wants a name on his rifle for that money it should have " GA PRECISION " stamped on it. GA's at the top of the hill and resale is top notch and the owner has proved himself as a "World Class shooter".

[rbros]

The customer supplying parts will typically save a guy a little money as long as everything fits together.  This way you aren't paying the excise tax that we have to charge.  Make sure you work with your builder to ensure everything fits together.  You might have a design that doesn't really fit together and will cause you headaches in the long run.  Lots of "world class shooters" are builders out there.  Many to choose from.

Any of the top barrel manufacturers 338 barrels will shoot lights out.  I haven't had a Broughton 338 barrel that hasn't shot in the 3/8" or less range.

Both targets are 5 shot groups.  One from a customer and another from my personal rifle.

[Biggerhammer]

There are two different sides to builds, the well informed and the not so well informed. I tell my smiths what I want and they do it, that's what their paid for. Simple as that. Now there are others that are not so well informed, first builds or beginners. That's where a good smith can lay it out for them. Any how, I would suggest someone looking to have a custom build for the first time talk with guys who have been there and done that before tossing themselves and their wallets into the shark pool.

[mountainman]

The customer supplying parts will typically save a guy a little money as long as everything fits together.  This way you aren't paying the excise tax that we have to charge.  Make sure you work with your builder to ensure everything fits together.  You might have a design that doesn't really fit together and will cause you headaches in the long run.  Lots of "world class shooters" are builders out there.  Many to choose from.

Any of the top barrel manufacturers 338 barrels will shoot lights out.  I haven't had a Broughton 338 barrel that hasn't shot in the 3/8" or less range.

Both targets are 5 shot groups.  One from a customer and another from my personal rifle.

proof in the pudding right there!

[b23]

I'm in agreement that Benchmark makes a great barrel but just about any of the top tier barrel companies make an equally "good" barrel as well.  Hart is my personal favorite but I have some Lilja's and a Broughton that are just as good.  There are 5-10 different barrel companies I'd use with complete confidence and the same can be said about gunsmiths as there are MANY that can do equally good work.  If I lived on the wet side of the Mtns I would have no concern using RBros or talking to Benchmark about doing my work.  I'm fortunate enough to have Shawn Carlock w/Defensive Edge just across the fence 20min. away over in Idaho but I've also had Kevin Cram (Montour County Rifle) in PA. build me stuff as well as Randy Melvin (Bull Mtn Rifle Company) in Billings MT. all were excellent!  If having your build say GA Prec. on the side is important to you, then that's exactly who you should have build it but just because one rifle says GA Prec and another doesn't, certainly doesn't mean the GA Prec. built one is any better than one built by a number of other excellent smiths.  If I was concerned about having "the best" maybe I'd get a rifle from Lazzeroni because John claims his are "THE BEST"! lol

I think picking the right barrel contour for the application you plan to use it, is one of the most overlooked aspects of a build with parts and pieces pre-purchased by the owner.  When you start slinging heavy bullets out of large capacity cases you want a barrel with a sizable diameter and the longer you go the bigger you should consider.  In something like a 338 Edge that'll be pumping 300 grainers out the end, it's overall weight should be a ways down on the priority list.  By the time you get it scoped up with a quality scope that's capable of consistently dialing up and down with repeatable results, you'll be around 12-14lbs and possibly more, depending on the stock you choose.  Take a look at the barrels in the pics of these long range shooters, they generally have pretty good sized contours on them, at least the ones that shoot really well typically do.