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Discussion Starter #1 (Edited)
i have a sporterized 98 mauser in 8x57 and next year i'm either going to rebore or rebarrel to the 400 whelen. (read https://web.archive.org/web/20101203...pace_myth.htm# to headspace it). i was going to do the 375 whelen but i already have a 9.3x57(.366"). and i can say that 4-something something!

since 150 lbs whitetails will be its main course, i'll only go 1600-1800fps in 200gr+/- gr fn gc. i hunt in close cover, so 60+ yards is a loooong shot, 25-35 yards is more likely.

1944 98 mauser 8x57mm




i've been thinking of taking it to JES(i like that peep sight) but i might rebarrel it to 24"(it has a 22" barrel). i doubt that extra 2" is a make or break situation, but i like the 24" over the 22". the 98 mauser NEEDS a timney trigger and i'll go with richard's stock( Richards Microfit Gunstocks ), it will be a wolverine style and either a blue coral or black walnut stock.

i doubt highly that i'll get the chance to hunt elk or moose, but my sons' might and i'll just happen to have a rifle that they can use....it sounds good, don't it!!!
 

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Discussion Starter #5 (Edited)

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I like your thinking. I remember way back when a certain fell named Professor Murphy made a statement that the only cartridge made off of the parent cartridge 30-06 that was actually better than the 30-06 was the 338-06. So I built one. Then I built a 35 Whelen, then a 375 Whelen. I never built a 400 Whelen but should have. I heard all of the nonsense about head spacing off a narrow shoulder would lead to grief. It won't be a problem. I have shot and loaded several rounds since those days with diminutive shoulders and never had an issue. Heck if a 450 Bushmaster can head space off of just the case mouth. The shoulder on the 400 Whelen has to be a god send.

Go for it. I am looking forward to the outcome.!
 

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You will have 1 very aggravating problem with that round. I have a .411 Hawk, which is the same thing, and you will find that you have to be very careful with the shoulder. It does not take much to bump it and mess up your head space. If I was to build it again I would go with the 338 cal.
 

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i have a sporterized 98 mauser in 8x57 and next year i'm either going to rebore or rebarrel to the 400 whelen. (read https://web.archive.org/web/20101203...pace_myth.htm# to headspace it). i was going to do the 375 whelen but i already have a 9.3x57(.366"). and i can say that 4-something something!

since 150 lbs whitetails will be its main course, i'll only go 1600-1800fps in 350-400gr fn gc. i hunt in close cover, so 60+ yards is a loooong shot, 25-35 yards is more likely.

1944 98 mauser 8x57mm




i've been thinking of taking it to JES(i like that peep sight) but i might rebarrel it to 24"(it has a 22" barrel). i doubt that extra 2" is a make or break situation, but i like the 24" over the 22". the 98 mauser NEEDS a timney trigger and i'll go with richard's stock( Richards Microfit Gunstocks ), it will be a wolverine style and either a blue coral or black walnut stock.

i doubt highly that i'll get the chance to hunt elk or moose, but my sons' might and i'll just happen to have a rifle that they can use....it sounds good, don't it!!!
Was talking with rifle builder (and a professional guide) the other day at HTC High Tech Custom Rifles in Colorado Springs, he said he had superb results with .338 Nosler bullet on a bull elk at over 400 yards, this past Fall. '06 case necked up.

From what he told me, sounded like about a 700lb bull that dropped in his tracks, on a shoulder shot. Impressive, as I hate wounding & tracking game though it happens sometimes.

Pretty sure he built this gun on a Winchester m70 action with very nice 3-position safety (that I also have always liked yet I enjoy other actions too). In general, he has consistently seen excellent results with .338 caliber on big game, he also has always said he has had great results with Swift A-Frame bullets. Believe he builds alot of .340 caliber magnums too, but don't quote me on that.

He also said his necked-up load was at around 2900 fps, but I remember him saying he considers that a bit hot. Have not researched those ballistics myself yet. Consistently, HTC has been an excellent source of information over many decades and always superb work performed on my rifles.

Sounds like another great and fascinating caliber built on what I think is a thick walled and excellent '06 case!
 

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Discussion Starter #9
mine will have to stay 8x57 because i got too many irons in fire. i need a mounting screw for my lyman peep sight, i should be getting it thursday. i cleaned out the barrel (took 2 or 3 days, 3-4 hrs each day) and i found the rifling is around 90%+/- good. when it was auctioned off, they said that the bore was poor and it did not have rifling 3 or 4" from the muzzle. boy, where they wrong. i have to slug it, but if you know germans, it will be .323".....or else!!!! the gestapo is coming for you. i've been thinking that a 200gr +/- fn gc going around 1700-1800fps will be good enuff. now i'll have to get lee reloading dies and brass.
 

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mine will have to stay 8x57 because i got too many irons in fire. .....

That's a bummer!
Some years ago I went down that same road you are describing with an 8x57
that wouldn't even shoot round holes at 50 yards - LOL some were completely sideways.
Yep, even went thru the same thinking process:
If you have to put a new engine in a hot rod - Put a big one in it
 

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I did a 375 ackley improved whelen that would drive the 250 gr HAWK SPITZERl bullet to 2650 fps. That calibre and bullet was an awesome killer, was going to build the 400 whelen but changed my mind, it couldnt kill any better. Built the 375 ackley whelen on a ruger m77 mk ii rifle, simple rebore/rerifle of a 25-06 ruger by the late dick nicohls in oregon.
 
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