I get 2950 with a bunch of 47SL and a 270 TSX in my 26" barrelled .375 Weatherby. That's actually slightly backed off in the interest of brass life. There are two distinct versions of the .375 Weatherby; the early 3/4 " freebore and the later 3/8" version. There's a big difference in the amount of powder the two versions will swallow.
375 weatherby vs 375H&H ackley improved
- Thread starter berkman
- Start date
I get 2950 with a bunch of 47SL and a 270 TSX in my 26" barrelled .375 Weatherby. That's actually slightly backed off in the interest of brass life. There are two distinct versions of the .375 Weatherby; the early 3/4 " freebore and the later 3/8" version. There's a big difference in the amount of powder the two versions will swallow.
With chambers cut with the same leade and cartridges loaded to the same pressures the two are identical...........look at the 7mmRM and 7 Wby. I have the Wby on a Sako L61R that I cut from an H&H chamber with 24" barrel, but have yet to work up any loads for it. Neither has any advantage over the other, unless headstamps and SAAMI specs mean something to you. I fireformed 100 cases for it using a bunch or R-P cases I had in H&H, never lost a one and they popped out perfectly. Of all the Weatherby chambered rifles I have the only actual Weatherby gun is my 378 and the only Weatherby brass I use is for that 378, everything else I shoot in Weatherby chamberings I make brass for from some standard case and usually in W-W brass. Therefore it doesn't cost a penny more to shoot Weatherby chambered rifles than any other magnum cartridge.
As "elker" pointed out I do seem to have an affinity for Weatherby cartridges, if not their rifles, but it just worked out that way. I have never considered myself one of the Koolaid drinkers of Weatherby propaganda, it just seems that in my search for the ultimate ballistics in each caliber I worked with, I ended up with a Weatherby cartridge. We must also keep in mind that most of this cartridge testing and playing took place before the 404 based cartridges hit the scene, in fact I was playing with them too even before the Imperial Mags came out. I don't think anyone will disagree that the 257 Bee is the ultimate 25 cal, now there is the 6.5-300 Wby is certainly a contender, with brass being 1/4 the price of the Nosler. I also had a 7mm-300 Wby on a Ruger #1 with a 28" barrel, then the 300 Wby was the top of the heap, until I developed the 30-404 Imp long before Remington or Imperial Magnum did. But we didn't have the powders then to really turn it on like today. I was very disappointed with the 338 WM and used several of them a lot, but was astonished at the change of reaction on game when you added 300 fps in the 340 Wby. I haven't taken any game with my 2X 37 cal Wby offerings (375 and 378) or even worked up loads for them as I may hunt with them one day but maybe not given the successes I have had with my H&H on game needing this range of cartridge and caliber..........HHMM, well that is kinda a disjointed rambling.............
Gate.......you specifically stated in other threads that you were about to build or buy a 375 Wby until the Ruger arrived on the scene.
As "elker" pointed out I do seem to have an affinity for Weatherby cartridges, if not their rifles, but it just worked out that way. I have never considered myself one of the Koolaid drinkers of Weatherby propaganda, it just seems that in my search for the ultimate ballistics in each caliber I worked with, I ended up with a Weatherby cartridge. We must also keep in mind that most of this cartridge testing and playing took place before the 404 based cartridges hit the scene, in fact I was playing with them too even before the Imperial Mags came out. I don't think anyone will disagree that the 257 Bee is the ultimate 25 cal, now there is the 6.5-300 Wby is certainly a contender, with brass being 1/4 the price of the Nosler. I also had a 7mm-300 Wby on a Ruger #1 with a 28" barrel, then the 300 Wby was the top of the heap, until I developed the 30-404 Imp long before Remington or Imperial Magnum did. But we didn't have the powders then to really turn it on like today. I was very disappointed with the 338 WM and used several of them a lot, but was astonished at the change of reaction on game when you added 300 fps in the 340 Wby. I haven't taken any game with my 2X 37 cal Wby offerings (375 and 378) or even worked up loads for them as I may hunt with them one day but maybe not given the successes I have had with my H&H on game needing this range of cartridge and caliber..........HHMM, well that is kinda a disjointed rambling.............
Gate.......you specifically stated in other threads that you were about to build or buy a 375 Wby until the Ruger arrived on the scene.
