quote:

Originally posted by lawndart:
Hmmmmm,

A new cartridge based on a 2.5" Rigby/Lapua case. Sounds like a scaled up version of the WSM line. If they go for staggered feeding from the magazine, these actions will be W*I*D*E.

Scaled up 300 WSM was my first thought when I heard about the 2.5" case for the .423 Dakota Lapua. They have the same shoulder angle (35 degrees). Could have knocked me over with a feather when I got that shocking news! Jumping on the Jamison Band Wagon are they?

Those of us on near beer budgets will have to get a CZ action and then put a spacer block in the magazine. "W.T.F., over?"

Alternatively we could go to straight line feeding and have a rifle that looks like one of those old Mossberg bolt action shotguns.

No need for either solution. Just avoid the problem. Use the CZ action and simply neck the Lapua case (2.7" brass, 20 degree shoulder) up to .423, load the bullets long with the extra cannelures or grooves available on North Fork, GSC or TSX bullets, then head for The Hill with Hilltop Arms' and Dead-On Ammo's .427 Lapua Kifaru.

Will this end up being essentially a 416 Rem Mag in a shorter, fatter form?

Won't the original 404 Jeffreys feed a lot more easily? Winchester 70 Classics in 300 RUM are common enough. Just add $1,000.00 and you can have a serviceable 404.

The nicely tapered unadulterated Rigby/Lapua case body combined with the 20 degree Lapua shoulder, and 3.8" COL with the longnose loading, makes the .427 Lapua Kifaru feed like greased owl crap in the CZ box.

Yes the .404 Jeffery in an M70 action with RUM box is slick and easy too, but they won't be making any more of those for now, so snap 'em up when you can find them.

I will be comparing loads in my .404 Jeffery with my .427 Lapua Kifaru, both using 24" stainless McGowen barrels of 10" twist, just for kicks.

I may be missing something, but it seems you will always need a decent dollop of powder to push a 400 grain bullet at a useful velocity. Why not have it encased in a piece of brass that is shaped for easy feeding?

Exactly right, hence the .427 Lapua Kifaru

Think how a 2.5" long Rigby case with 35 degree shoulders will look topped off with a 400 grain round nosed bullet. In the old days even the cable channels would wait until after 11:00 pm to show something like that.




Maybe Hamilton Bowen can convert a revolver cylinder to hold three of these.


I'm sorry, I'm being too harsh. I'm sure this cartridge will shortly dominate the over 40 caliber class at the benchrest super shoot.



lawndart

PS These will run at much higher pressures than the old cartridges, right? I keep forgetting if that is a good or bad thing.

I think they will be claiming only 50 fps faster velocity than the 2.5" .404 Dakota based on the shortened .404 Jeffery. They apparently have recognized a pressure concern with the .404 Dakota and will not have higher pressures with the .423 Dakota Lapua. The sales pitch here is ample power but gentler recoil than the .450 Dakota, with shortmag benchrest accuracy and reasonable pressure, for the discerning shooter who likes wood upgrades.