Huh? Am I missing something here?
Possibly.
There are three action lengths as widely accepted standard.
Short action.
The most powerful (arguably) short action round is 308 Win. LOA - 2.8''.
All cartridges of that size and less go in short action.
223 rem (loa 2.26 inch), 308 win, 243 win, etc. This max lenght is not fixed, and with some designs some a bit longer cartridges can fit in short action, But as general rule, 308 win LOA and below defines short action.
Medium action
- is for cartridges such as 30-06 (LOA 3.34), but rough standard for medium action is LOA -3.34 inch cartridge, or less.Medium action is defined as general rule for cartridges between 2.8 and 3.34 inch LOA
Now look at this:
300 win mag - LOA 3.34 inch
338 win mag - LOA 3.34 inch
458 win mag LOA 3.34 inch
Magnum length action:
Cartridges with LOA above 3.34 inch get into realm of magnum length action.
Most famous are 375 H&H - LOA 3.6 inch and 416 rigby - LOA 3.75 inch.
With a bit of gunsmith redesign work, 375 HH can fit to medium lenght action, but it is extra work on medium action, adjustment and probably higher production cost. Two rifles of medium action that come to mind are: WInchester m70 and zastava m 70, are done like that to take widely poplar 375 HH round.
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Cost of this design on medium action is also reduced mag capacity, and in some cases feeding problems, if adjustment to large cartridge was not done properly.
So to put large cartridges in big guns, you need magnum action.
But, keeping production of short, medium and magnum action is keeping three productin lines, and this increases the cost of production.
Factories avoid this, because for magnum lenght action is relatively small market. (who of all the hunters in the worl, really needs elephant gun?)
So, market for magnum cartridges is relatively small, reserved for big bore aficionados, and Dangerous game hunters.
95% of rifle users will be happy with calibers in medium and short action, as they cover calibers for sport shooting, and 95% of all world wide hunting needs.
So, majority of factories avoid making guns in magnum lenght action. To avoid extra production costs, for separate production lines. If they make it it will be expensive.
But in that way DG hunters, middle class market suffers.
So, companies like ruger, or remington invented short (and fat) magnums, like
375 ruger - LOA 3.34 inch (ups!) - ballistic twin of 375 H&H, that fits in medium action
Or,
416 rem mag LOA 3.6 inch (same lenght as 375 HH), ballistic twins of 416 rigby (loa 3.75 inch) , of resonable lenght in modern shorter version then rigby variant.
All shorties are designed to fit with design adjustment in medium lenght bolt action.
There is nothing wrong with them, those short magnums - ballisticlly, They have power and performance, but problem for them is, ammunition is not always widely available. Especially in Africa.
They are better for reloaders, then for those that depend on factory ammo.
Which factories make ammo in this caliber? (Few) If I buy rifle in short modern magnum, I will not have possibility to buy ammo in my place / country.
In the sam time, high end factories and workshops keep producing magnum length action for DG guns in magnum leght calibers, for classic and traditionally popular calibers.
But going that route, the rifle classic magnum leght caliber today will be very expensive. New mauser 98 in magnum leght action goes for more that 10k eur. or more. Thats the cheapest
Standard factories avoid producing magnum length action, so this becomes commodity for higher class exclusively. Blue collar class, will more and more depend on medium action rifle, and short magnums because of price of rifle.
Factories that I know that produce magnum length action are Sako (non mauser 98 type), then: Mauser, Heym.
Elite workshops such as H&H, RIgby, Westley richards, purdey.
Thats magnum action prudced today, and now check the price.
Then you have all other common man factories, producing medium length action, and very few that chamber 375 H&H.
To be noted, 375 H&H is most available DG magnum ammunition today, but finding a rifle for acceptable blue collar price, is another matter.
Bottom line, magnum length action becomes extinct. Thus the question.
Try to find one for reasonable price, not being second hand.