Okay, it was offered to me recently, but I do not want another 30-06 nor a discussion on why a 30-06 is just as good as the 300 H&H...LOL


Instead, can on of these H&R Ultras be rechambered from 30-06 to 300H&H?

You probably could, and only use low pressure loads, so there'd be no point. A Handi can take a lot, but not 300 H&H pressures.

Albatross.

I figured it handled the 500 S&W Mag and the 450 Marlin, so????

I am only looking at factory levels////

quote:

Originally posted by Albatross:
You probably could, and only use low pressure loads, so there'd be no point. A Handi can take a lot, but not 300 H&H pressures.

Albatross.

Yes, you can. The hh is a moderate pressure round.
The ULTRA is the high pressure action, higher pressure than the rifle, and the rifle is higher pressure than the shotgun actions. Per HR

Thanks Jeff...

Not sure I will do it, but love the old cartridge and it would be a cheap way to have one in a backpack hunt.

It would work and be just fine. Full house loads would work as well.
If it was designed to handle modern 30-06 it can handle any 300H&H

333 OKH

I have a Ruger #1 in 300H&H that I would sell you for about what it would cost you to buy that H&H and have it converted.

quote:

You probably could, and only use low pressure loads, so there'd be no point. A Handi can take a lot, but not 300 H&H pressures

The Ultra is chambered for the 25-06 which is 65,000+ compared to the 62,000 for the H&H. However I have no clue if the the extra 2000lbs of bolt thrust would be an issue.

quote:

Originally posted by ramrod340:

quote:

You probably could, and only use low pressure loads, so there'd be no point. A Handi can take a lot, but not 300 H&H pressures

The Ultra is chambered for the 25-06 which is 65,000+ compared to the 62,000 for the H&H. However I have no clue if the the extra 2000psi of bolt thrust would be an issue.

There's no bolt, so probably not.

quote:

There's no bolt, so probably not

Excuse me. I know there is no bolt. So the "CASE HEAD THRUST" will increase 2000lbs or around 20%

Yes and no. It will work for a while. The hinge pin will deflect and the notch in the barrel lug will beat out and need to be shimmed on a regular basis.

quote:

Originally posted by ramrod340:

quote:

There's no bolt, so probably not

Excuse me. I know there is no bolt. So the "CASE HEAD THRUST" will increase 2000psi or around 20%

How do you figure that ..??

pressure*surface area ... its still bolt thrust .. call it back thrust if you like

quote:

pressure*surface area ... its still bolt thrust .. call it back thrust if you like

My mistake for the confusion I called it psi my fingers out ran my old brain. Should have been a simple 2000lbs or 20%

Fair enough, the Handi can handle some stiff loads. I have a BC in 45/70 [I stick to trapdoor data as it's plenty accurate]. I've read mostly to stick to low-middling loads, and if you need to go big, buy a 458 mag in another configuration.
BUT, 300H&H data seems to run mid-high 50,000s CUP with a .532" dia cartridge base [45/70 = .608]. 458 mag is in low 50,000s with same base dia as the 300H&H. The 300H&H also has a lot of taper, compared to the 45/70, or 458 mag. I don't know for sure if the taper would make much difference, but the .256 Win and .22 Rem Jet displayed ++setback in revolvers. Wouldn't this also be a problem in a Handi, and direct more thrust rearward? I don't know the answer to this, just bringing up something to consider.


Albatross

quote:

if the taper would make much difference

None at all. Look at what stops the cartridge case from moving along the bore axis and calc that. The shortcoming of most break open actions is the closing/locking mechanism. There's usually a spring involved somewhere and the resulting compression or lack therof is a potential problem.

quote:

Originally posted by Albatross:
Fair enough, the Handi can handle some stiff loads. I have a BC in 45/70 [I stick to trapdoor data as it's plenty accurate]. I've read mostly to stick to low-middling loads, and if you need to go big, buy a 458 mag in another configuration.
BUT, 300H&H data seems to run mid-high 50,000s CUP with a .532" dia cartridge base [45/70 = .608]. 458 mag is in low 50,000s with same base dia as the 300H&H. The 300H&H also has a lot of taper, compared to the 45/70, or 458 mag. I don't know for sure if the taper would make much difference, Albatross

sir.. the 458 winmag and the 300 HH are loaded to the same pressures ..with the same casehead diameter ...55k cup is about 62,500 psi ...

quote:

Originally posted by Moorepower:
Yes and no. It will work for a while. The hinge pin will deflect and the notch in the barrel lug will beat out and need to be shimmed on a regular basis.

Horsefeathers!

quote:

Originally posted by ColoradoMatt:

quote:

Originally posted by Moorepower:
Yes and no. It will work for a while. The hinge pin will deflect and the notch in the barrel lug will beat out and need to be shimmed on a regular basis.

Horsefeathers!

+1

If by regular you mean every 10 to 12 thousand rounds. Maybe

Someone years ago on the Graybeard Handi forum had made a 300 Win Mag on a Handi, and it stretched or loosened or something, within a very few rounds.

I looked at the current Handi and Ultra offerings, there are no 7 mag, 300 mag, weatherby mags. Yes, there is a 500 S&W, but Hodgdon lists loads peaking at 52,000 PSI. I have never heard of 62,000 psi 45-70 loads, but I don't have one, so I don't know.

I have a Handi Rifle, with barrels in 243 and 44 mag. Even after a trip back to the factory, the 243 gave vertical strings of 12 inches, and occasionally opened the action on firing. I sold that barrel and bought a used 243 barrel. It shoots under 3 inches at 100 yards, if I stick with starting loads. This cheap gun has been very expensive, since it can't do the job I bought it for, not to mention the wasted time and components.

With the 44 mag barrel it is a pretty decent shooter, but it kicks too much for my wife and daughter.

Don't waste your money on the Ultra. Maybe find a Model 1917 sporter to rechamber to 300 H&H? I know Savage has actions long enough, and they have offered a 375. Savage it twice the rifle as the H&R.

My opinions only.

Here is a quote from the Graybeard Handi forum, about a 300 WSM rechamber. I don't know what WSM pressures are, so it might not be apropos.

"You can probably find a gunsmith who would...but..the Handi won't handle it..and you'll peen the under lug or stretch the frame..Sorry..I don't think you'll find anyone who recommends it...I certainly don't..and I bought the original 300 WSM barrel that has been talked about before..After 3 factory loads...and 100 mid-range reloads..it no longer fit Handi35's frame...It looks like it enlarged the underlug somewhat..and will take about .010" feel gauge to match it to any of my frames...My advise is to look to another venue for a 300 Win mag...I hear the Remington Sendaro's are absolutely awesome in this caliber...

Mac"

Maybe I just need the Ruger #1 after all

quote:

Maybe I just need the Ruger #1 after all

Then buy that one JBrown has on sale in the classified. Cherry wood great price.