I looked for 35 cal. cartridges, here is what I found in the shop.
From Left to right: 35 Remington, 350 Remington Mag, 35 Whelen, 358 Norma Mag, 350 Rigby Mag, 358 STA, 358 Ultra

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John, Which one do you like??

Mike

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Victory through superior firepower!

If properly headstamped brass was not such an expense, it would be the 350 Rigby Magnum.

Next choice is the 358 Norma in an action with enough magazine length for high sectional density bullets.

Cool, I was wondering if the STA and Ultra were too much of a good thing!!

Mike

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Victory through superior firepower!

I haven't fired either a 358 STA or 35 Ultra, heck, haven't even lit off a 350 Rigby yet, but from John's comments, the larger cased 35's can rank as too much of a good thing. The way I look at the 350 Rigby, and 358 Norma for that matter is 225 gr @ ~ 3000 fps, 250 gr @ 2700-2800 and 280 gr @ 2400-2500.

To my mind, that achieves all you want in a 35 bore, and more speed comes at a cost of a tremendous increase in recoil, and you don't gain any killing power for that recoil, just a slight increase in range, and potential bullet integrity issues up close.

What I like about the 350 Rigby is the gently tapered case for slick feeding, but the brass issue is a bit more involved then I'd first considered. Re-working 375 H&H brass is much more extensive then I'd first assumed: you need to cut off the belt, reduce the dia of the rim, cut a deeper extractor groove, trim to length and neck turn the case. Makes the $65/20 case price a bit more attractive, though it's crummy bertram brass. If I could get quality brass at $2 a case, it would be a no brainer.