My JES 35/30-30....no longer Micro-Groove?

[fremont]

I had JES rebore my Marlin 336C 30-30 to a 35/30-30. With the 3-groove barrel, is it technically no longer MicroGroove rifling? I'm assumed that it is not. If I'm correct, I'd like to try and shoot 200 cast FNGC's closer to 2000 fps.

[adcoch1]

If it's three groove, it sure ain't micro groove! Shoot cast and be happy!

[pietro]

.

Micro-Groove rifling is Marlin proprietary process, patent protected, that consists of 16 grooves ILO Ballard rifling's 3-7 grooves.

Any re-bore needs to remove the previous rifling of any kind, in order to be effective, so your re-bored Microgroove Marlin has lost it's groove....


.

[35 shooter]

Nope...your no longer micro groove lol. You should ,however, have one fine cast boolit shooter...or jacketed for that matter.
If i ever get a JES re-bore, it will be the 3 groove for sure.

[MyFlatline]

Gee, I shoot cast quite well out of many micro groove Marlins. Have never had an issue...

[sukivel]

Is 3 groove better tan micro groove?

.35-30/30 sounds interesting...


Sent from my iPhone using Tapatalk

[35 shooter]

Nothing wrong with micro groove for cast or jacketed at all. As for my above comments, i was simply letting the op know(as others did), that after the Jes re-bore he had done, he no longer had the marlin micro groove in his bore for sure.

As for the 3 groove bbl., I just like the idea of the groove and land widths on it if i had a JES re-bore done. That's just me though, as from what i've heard and read, all of JES re-bores shoot great inspite of how many lands and grooves.

That 35/30 is indeed interesting....pretty much 35 rem. power made from common 30/30 brass.
Like the op...one of these days i'm going to find the perfect(for me) donor rifle for that very re-bore!

[MyFlatline]

I understand 35, I was also just making sure the OP knew that the Micro Groove guns will still shoot cast. J E S has a 30-30 of mine currently, it is being transformed into a 375. I've seen some of his work and it is great.

[missionary5155]

Good morning
Be very careful with Jes's work... It can become addictive. We have 7 and another waiting to go when we get back north.
If you want something that will really put the "thwap" on target try a 405 JES...
Mike in Peru

[fremont]

I understand 35, I was also just making sure the OP knew that the Micro Groove guns will still shoot cast.

Thanks, I do but much of what I read said try and keep velocities no more than 1600 with MG barrels. I'd like to shoot the .358" 200 FNGC closer to 2000 fps.

[35 shooter]

Micro grooves generally like fat boolits, as in 2 thou. Dia. Over what the bbl. slugs. They can shoot cast fast when fed what they like and those small lands and grooves are sealed off properly. I think the old Lyman manuals are probably responsible for the rumors of only 1600 fps. In the marlins.....they got that part wrong lol.

Having said that though, I'd rather have the Jes re-bore to 35/30. Give us a report on it when you get it up and going!!

[Djones]

There is no need to slow down cast bullets in a micro groove. We shoot 0.361 diameter 200 grain gas check bullets at around 2080 fps in four 35 Rems with microgroove in my family.....extremely accurate and deadly.

The JES three groove 358 win I have is more like MAXI-Groove

[FergusonTO35]

I can't tell any difference when shooting boolits through my .30 WCF rifles with Micro Groove and those without. I size to .310 with Randy Rat's Tac-X.

[OverMax]

Last time I peruse Midway USA. They advertised Redding dies for the 35-30/30 ~~price: 180.00 ($) plus shipping.
Using 30/30 brass as a substitute brass in the making of the obsolete 35-30/30. A home reloader should be made aware not to exceed the suggested Maximum case Pressure. Something {information} JES should make their prospective customer aware of.

[RPRNY]

Last time I peruse Midway USA. They advertised Redding dies for the 35-30/30 ~~price: 180.00 ($) plus shipping.
Using 30/30 brass as a substitute brass in the making of the obsolete 35-30/30. A home reloader should be made aware not to exceed the suggested Maximum case Pressure. Something {information} JES should make their prospective customer aware of.

I'm curious what point you are making about max pressure here. You seem to be under the impression that 1) 35/30-30 is obsolete and 2) that it was at some time a standard or catalogued cartridge.

As long as the 30-30 isn't obsolete, neither is The 35/30-30. The 35/30-30 is the second oldest smokeless wildcat in the country, just behind the 35 Krag, and probably more popular. It was never anything but a wildcat and the only brass for it is 30-30 brass fireformed or necked up to 35 cal. There is no SAAMI MAP for the 35/30-30.

Given that we are using the same case as the 30-30 and expanding it to 35 cal, the 35/30-30 has substantially lower pressures than the 30-30. In a safe and functional rifle, there is no way to produce pressures that exceed those of the 30-30 with appropriate powders and projectiles that will feed from the magazine. Unless using very short bullets loaded into lands, the 35/30-30 does not have much in the way of increased powder capacity, certainly less than the 30-30 AI, which takes the case from @45grs H2O to @51grs H2O.

So, Jesse need not warn anyone about pressures in the 35/30-30, because they are likely lower than 30-30 MAP. IMR 3031 and H4895 with 180 grs cast boolit like the SAECO 354 GC pistol boolit sized .359 work very well. Many bullets that work well with 35 Rem up to 225 grs will work fine in the 35/30-30 but cast in the 180 - 200 grs are the sweet spot IMHO.

[OverMax]

RPRNY

35-30/30 isn't what I would call a {true} wildcat cartridge. "Just a inventors illusion being no one ever marketed a firearm or ammunition for."_ I supect the manufactures back then for one reason or another decided it wasn't worth their effort due to little or no marketplace interest. If I were to Categorized? {35-30/30 is at best a red-headed step child in the world of cartridges today and back in its hay day too.} Its only purpose. To accommodate those owning a 32 special or 32-40 with a corroded barrel in such deteriorated condition it lacked any resemblance of accuracy. Keep in mind OP the 35/30 will never~ever in any Reloading close the gap between itself and the 35 Rem. Due to the 35 Rem's 14% larger powder capability and its much stronger brass cartridge case. If allow to suggest for safety sake? Keep those 35-30/30 loading under 42000 Psi irrregardless of bullet weight anything above in Psi? May rupture its 30-30 brass.

[RPRNY]

Its only purpose. To accommodate those owning a 32 special or 32-40 with a corroded barrel in such deteriorated condition it lacked any resemblance of accuracy. .

A misconception perpetuated by gun "writers". The same folks that regurgitate that will tell you that the 30-30 was introduced as a black powder cartridge. Plenty of 30-30 barrles have been bored out to 35 Cal.

The 35/30-30 can be made to run safely pretty close to the 35 Rem, but then the 35 Rem can be hot-rodded too. In any event, your main point is spot on - the 35/30-30 exists mainly as a remedy to shot out 30-30, and 32 Special barrels. That being said, it is a far better cast boolit shooter than the 35 Rem. A 225 grs wide meplat boolit at 1900 fps from a cut rifled barrel makes a tremendous hog, deer, and black bear rifle. And it'll run 250 grs at 1800 fps. The 35/30-30 AI is nigh on a 375 Win, with plentiful brass. It will never make for a trophy wife and the "need" to "save" an old lever gun isn't much in need today but in the Northeast at least, the 35 Rem is still pretty popular and the 35/30-30 with cast boolits is just as much rifle, all in a handy, lightweight rifle.

Rather than red-headed stepchild, I'd say the Hamburger Helper of the cartridge world.

[OverMax]

RPRNY

Well not being a home reloader very long. I bow to a better informed fellow than I.

[fiberoptik]

Didn’t know there was an ai version. Oooohhh!


Sent from my iPhone using Tapatalk

[northmn]

The conversion to 35-30 is an interesting one and I hope the OP is happy with his. I have a 35R with a Ballard rifled barrel that will shoot cast very well although the 35-30 is said to e better with a 250 grain cast. I also have a 38-55 Marlin CB and if I want to shoot very heavy bullets that is my go to. JES does an excellent rebore to his version of a 38-55 with a 376 bore which makes for a great combination and would be my choice. However, if one already has a bunch of bullet molds, the 35-30 does have an advantage at the other end of the scale in that 38/357 cast bullets can be used a plinkers. One is still using the 30-30 case. Would rather have it than a 357 rifle. We concentrate so much on the upper end we tend to over look other uses.

DEP