I have the weatherby accumark 30-378. Im looking for a gun smith with knowledge of the 30-378. Im interested in accurizing the action, supply and installing a new 30" +/- barrel. Any and all suggestion will be greatly appreciated.
THANK YOU CAM
One more try. Any suggestions on a gunsmith. Also, With a new barrel any advantage or disadvantage of the 338-378 vs 30-378. Is there a better trigger for the Weatherby?
Most gunsmiths I have talked to don't like Weatherby actions and suggest remington action and a standard 300. I'm left handed and can't find a remington mag action. Nesika bay has left handed actions. I do need a safety do the triggers have the safetys and I don't understand carrier or pinned. Any suggestions? I just want an accurate cannon out to 1000 yds.
THANK YOU CAM
Where are you located. Here in Pa., we have quite a few very good gunsmiths who specialize in long range rifles. Many 'smiths are against using the Remington action for the 378 case as it is a bit too large and leaves only marginal metal around the case head. You could go with the 300 Tomahawk and that should work well in a Remington action. It is the 300 Ultra Mag improved. Look on the board, DC posted some info about a project rifle in this caliber.
I don't know anything about Weatherby actions so can't help you there. Try calling Ray Romain, he builds a lot of long range rigs and has the reamer for the Tomahawk.
Email me if you'd like further info.
Cam, Couple of questions.. Why the rebarrel? I am assuming that you either attempted but could not find the accuracy and or speed your looking for with loading or have shot the barrel out? I ask this because I am looking for accuracy in the same caliber/gun although I have just gotten through breaking the barrel in with factory ammo and am awaiting the rest of the tools needed for reloading/ accurizing the ammo. I have quite a bit of starting data for 150 and 180 grain loads but have yet to find much for 220 grain. Everything I have read on this board says chop up the gun, get rid of the freebore, get a longer barrel etc. I will get a longer barrel after I wear this one out, but for now I think I am going to try and work with concentricity, neck tension, and possibly bullet crimping for more reliable powder ignition and maintain the freebores potential velocity. This versus having the freebore taken out to "set it in the rifling" and increase pressures and make it a 300 RUM with just too much case capacity. All of this to say....What is the most accurate powder you have found for 200-220 grain balls?
Just had a phone call from a fellow in Colorado who finally got his accumark (30/378) to shot with 180 grain bullets.
As a matter of fact, Weathertby heard about it and wanted to have the rifle back so they could check it out because of all the problems with accuracy complaints they have had.
As he told me, the 180 gr does him NO good as he wants to reach out much further and wants to use the 220 gr in it.
Not only is the Freebore the problem with accuracy but, normally out of the 9 small locking lugs on a Weatherby action, most of the time, there only three (3) that are touching when engauging the bolt . You must lap these in and that takes quite a long time to do in most cases.
All you would have to do is have the barrel set back 1/2" to 3/4" to eleminate the freebore and lap the lugs. Would help that rifle alot. You would then have less then 26" of barrel to use though. A new 30" custom barrel would give you 100 to 140Fps more velocity and it would be much more accurate then the standard Weatherby barrel.
They (Weatherby) advertise a 28" barrel which is not true. The barrel is 26" and with the brake on, it measures 28". The brake does NOT add to barrel length because the bullet can NOT touch it in a any way. The bullet must have at least .016" clearance around it when it exits through the brake for the brake to work. Therefore, that extra two inches is not acting as a rifled barrel.
I would get rid of the freebore and lap the lugs first. If that didn't work, a NEW barrel would be installed.
Call Ray Romain (Romains Custom Guns) at 814-265-1948. He can help you out.
Only have experience with one Weatherby but the results were very good. The load was with H870, CCI mag primers, and 180gr Nosler BT. With a near max load, the vel was over 3400fps with 1/2 MOA accuracy. Brass was sized using FL RCBS dies and seated using a die from the same set. Bullet length was kept so that rounds would feed from the magazine. Brass life has been good.
Another load with Speer Grand slams was horrible. 2 to 4 MOA groups. Bullet probably not designed for this velocity. H1000 was also tried but results were not good.
This rifle also shot the Factory loads with Barnes X 180 very well. Maybe just a lucky gun. No work has been done on the rifle except to mount a scope. Muzzle break left on.
I shoot a 300Weatherby in a custom rifle. There is also freebore but accuracy is excellent. Freebore may not be that big of an evil if loads are prepped properly. I neck size and there is a very close fit in my case and seating die. Ammo is concentric.
I am agreement with the removal of freebore to increase accuracy. It just happened in my 300 Weatherby because that was the style of the reamer used. It does, however, illustrate that if ammo is prepped and loaded properly, many mechanical sins can be overcome. At least this should be tried before a potentially accurate rifle is gutted.
With the 30-378 Weatherby, maybe it is just a "lucky" gun. 180 gr bullets is all that is desired by the owner. Accurate to minute of mule deer out past 700yds. Not bad for an off the shelf rifle. The owner used to think 300yds was a LOOOONG ways off.
Been following your Tomahawk project and was wondering how close the improved 300 Weatherby's would get in vel. launching the 240MK out of a 30 to 34" barrel? I am guessing that the improved 300W look very similar to a 7STW necked up and maybe more shoulder angle/less taper.