I had a different thread going and all it did was put more ideas in my head. There are so many different options for this project I am totally lost where to go now.

The 375's based on the 06 case (Hawk, Howell, Whelen, AI, etc...) have a lot of merit. They can be easily formed from 35 Whelen brass and the mag will hold 5 rounds of the stuff. The action will require little if any modification or alteration which keeps it cheap. the downside is finding load data and chamber reamers and dies.

The 376 Steyr is factory available but I am not sure of how it compares ballistically to the other 375's. Not sure of mag capacity or work needed to the action either.

If anyone could please share their info on the different rounds (especially ballistics)it would help me gain a better understanding of each rounds merits and ease of finishing this project.

Thanks for the info and opinions you have shared with me so far.

From the weakest to the strongest:


375 Whelan
375 Whelan AI
375 Hawk/Scoville when 9.3x 62 brass is used
376 Steyr/375-338 Win Mag
375 H&H
375 H&H AI/Weatherby

The Steyr is the shortest of the bunch; it will fit an intermediate action without opening the action. In fact it fits my MRC 1999 short action with a bolt face mod only. Jeffe can say for sure but I think you get at least 4 down. It also matches factory 375 H&H ballistics in 22" barrels but a handloaded H&H will outperform it 100 FPS.

Thanks for putting that in scale for me. I really appreciate it. Do you have velocity figures of the Steyr?

What work would need to be done to a VZ-24 for the steyr?

Who is a good gunsmith for this project?

Hornady has pretty good data for it and if you google 376 Steyr; Eric Ching you'll come across some 300 gr data, Basically, 2400+ fps with 270 gr, 2300+ with 300 gr. All you need to do is open the bolt face slightly, they usually feed without mods to the rails. Any good smith can do it if they have the reamer.

Simplify your life, shoot a 9.3x62, 9.3x64, or a 375 H&H..These can be built up on a good Mauser action..Holland and Holland, Westley Richards, Browining, FN, and various Mark 10s including the Whitworth express have been doing it for years...Open them up in the rear is good advise and I would do that, but Whiteworth nor Browning bothered to do that and I have never seen nor heard of problems with either make.

These calibers beat any Wildcat caliber from a practical standpoint and will be around til hell freezes over.

The Styr is an interresting caliber, but its stay on this earth is surly limited, at least I suspect that, and brass may become a problem down the line...Sales for it have not exactly gone through the roof..and that is a shame.

You have a PM.