I'm trying to understand the difference in max pressure for those two cartridges, with the 35 Rem at 33.5K and 30-30 at 42K. What's behind my question is that I have a Marlin 336C 30-30 which I rebored to 35/30-30. Since I'm using 30-30 cases, I'm using that as max pressure in QuickLoad, but I'd appreciate knowing a little more about the difference, as many sources reference the 35 Rem as a starting point for the 35/30-30.

I doubt the cases are the reason for the difference in max pressure, More likely it's due to the .35 being originally chambered in an autoloader.

Yep. Some cartridges suffer in regards to pressure limits due to the platforms in which they were offered......

You should have had it chambered to 356 for a significant gain in horse power.

I've always wondered, shouldn't it be called the 35-30, instead of 35/30-30? (Or maybe 30-35?)

No

[quote=fremont]I'm trying to understand the difference in max pressure for those two cartridges, with the 35 Rem at 33.5K and 30-30 at 42K. What's behind my question is that I have a Marlin 336C 30-30 which I rebored to 35/30-30. Since I'm using 30-30 cases, I'm using that as max pressure in QuickLoad, but I'd appreciate knowing a little more about the difference, as many sources reference the 35 Rem as a starting point for the 35/30-30. [/quote

Perhaps the 35 Rem was limited by the strength of the Remington Model 14 pump gun and the Standard that could function as either an auto-loader or a pump gun.

A Marlin 336 in good condition will handle the 356, or 358 if you stick to 356 COAL specs.

IIRC, Paco Kelly has published hot loads for the 35 Remington in the Marlin 336 that run tight on the heels of the 356.

35 Remington was chambered in autoloaders, so they make the ammo and publish hand loads that will work across a wide range of firearms! I doubt that a deer at the usual ranges will be able to tell the difference! One of my guest that I let hunt on my land during rifle deer season, shoots a 35 Remington, and it's mostly a one shot deal! With wildcat cartridges you are pretty much on your own, work up slowly and carefully!

The Marlin is basically a 40k action so you will be fine loading to that level. I have worked with a few improved 30-30 chambers with a shorter neck and a worthwhile bonus is to be had.

this question was asked on the marlin forum the other day. the auto loading thing came up to because the 35 was originally an auto loader. but they also made the same model 8 in 25,30,and 32 rem. the 30 is nothing more than a 30-30 that is rimless and uses the same 30-30 data. I shoot all the calibers in model 8s 81s and the model 14 and 141 pump actions. so to say it is because it was formed in an auto loader first cannot be the reason.

Yes, it can. The .35 Remington has a larger head than the .25, .30 and .32 Remingtons, which creates more bolt-face pressure.

But whatever the reason for the lower pressure of the .35 Remington, case strength itself isn't the limiting factor.

I may be missing something maybe but why didn't you just trade for a 35 Remington in the Marlin

Likely did the rebore as 30-30 brass is more plentiful.

Doc

Should be 35/30WCF.

Makes sense to me!

I can offer a bit of somewhat related info - when used in stronger actions like the 760 and 7600 pump guns, the 35 Remington can be pushed to higher pressure than published load data safely. It cannot handle full pressure like the 358 Win though in my experience; the case is strong but not quite that strong, at least with my R-P cases.

Largely sentimentality. The first new rifle I purchased. 1981

And, thanks for the help on my question.