AKA 375 Whelen Ackley Improved AKA 375-06 w/40 degree shoulder and shoulder blown out.
I got my 98 Mauser 375 WAI built. ER Shaw no. 2 contour 22”, I rented a reamer and cut the chamber by hand. CH4D dies. I used 35 Whelen Hornady Brass - opened it up to 416 and set the die down with the CH4D dies to meet the ram on the press, thereby getting my ‘go’ chamber.
So far 55 grains TAC and 270 gr. RN Hornady bullets (shoots well) and 31 gr H4895 with 233 grain cast (no gc) are the two loads I’ve used. The cast load is very low pressure and doesn’t leave a sharp shoulder, but that’s my fire forming load. I’ve ordered/received a NOE 270 grain mold (gc) but it’s way below zero outside and I cast in my shed, there’s a wood burner in there but I’ve been busy.
I have a boat load of those 270 grain Hornady bullets.
I’m planning on trying IMR4166 powder though I’ve not seen any loads with that powder. I’ll also be looking at powders with similar burn characteristics.
My 98 Mauser (action built between the wars) has a steel Lyman Aperature sight and a post front sight. I had bought what might be a Brown Precision synthetic stock here on the fire, but that would work well with a scope, not iron sights - too high a stock. The stock I bought and am using is from flea bay - laminated. It took a lot of material removal to get it to fit. I also bought a plain walnut stock - same story lots of extra wood.
If anyone has more to add regarding this cartridge, it would be appreciated. I’m thinking I will be using mainly the NOE bullets and for deer. If I scrape up enough coin I might take this bear hunting in Alaska and I think jacketed bullets. It should work in Africa on Cape???
