Anyone rechamber a 30/06 to 300 H&H

[peternap]

?

[Lazermule]

No, but it sounds like fun.....I'd like to see if it can be done....I have the dies and brass, just no 300H&H Rifle...(I reload fro my cousin)

LM

[peternap]

No, but it sounds like fun.....I'd like to see if it can be done....I have the dies and brass, just no 300H&H Rifle...(I reload fro my cousin)

LM

It should be a simple rechamber. The H&H is bigger than the 06 I'm sure. I like the idea of the belted case for head spacing and it's something I don't have.

[Lazermule]

I suppose the same would hold true to bringing a 280 out to a 7mm-rem Mag??

[peternap]

I suppose the same would hold true to bringing a 280 out to a 7mm-rem Mag??

Might!
The Handi's don't have enough length for the 7Mag and I;m wondering the same thing about the H&H

[jeepmann1948]

Don't think this will work due to the higher pressures of the Magnum Cambering. Tim has  a lot more knowledge on this,  he tried a short  300 and it stretched the action . I am sure he will have more knowledgeable input on this .

[Dead doc]

A friend of mine  wanted one REAL bad   he owns  7  H&Rs in different cals   FOund a Marlin SS1 on the internet in 300 H&H and it is a real blast .  VERY nice shooter  doesnt lock up all that different than the H&R  . I GUESS its feasable  GREAT calibre  I WANT ONE TOO NOW
   

[quickdtoo]

It's been discussed before, even hot loads in 30-06 class rounds can cause internal action flex, most likely at the latch pin due to it's small size and not being supported near the latch, have done it with my 280 Improved Ultra(frame to barrel gap after the shot), the larger case head of the mags is just too much for the SB2 action if you want to load to them to full potential of the cartridge. The flex is obvious even in non-magnum max high pressure chambering case growth, a fired case won't allow the action to close completely, if you take a look at the action to barrel fit after the shot, you'll see the amount of flex by the gap it created. The reason why H&R didn't offer the Handi-Mags is because they didn't make the new frames required for them, they didn't get enough distributor pre-orders to justify the $20K required for production and testing.

Tim

[Spanky]

The 300 won't kill 'em any deader than the '06 so why ruin a good barrel.



Spanky

[peternap]

It's been discussed before, even hot loads in 30-06 class rounds can cause internal action flex, most likely at the latch pin due to it's small size and not being supported near the latch, have done it with my 280 Improved Ultra(frame to barrel gap after the shot), the larger case head of the mags is just too much for the SB2 action if you want to load to them to full potential of the cartridge. The flex is obvious even in non-magnum max high pressure chambering case growth, a fired case won't allow the action to close completely, if you take a look at the action to barrel fit after the shot, you'll see the amount of flex by the gap it created. The reason why H&R didn't offer the Handi-Mags is because they didn't make the new frames required for them, they didn't get enough distributor pre-orders to justify the $20K required for production and testing.

Tim

I'm not so sure about the 300 H&H Tim. The 300 H&H is really one of the lowest pressure of the 300 magnums. The bigger case makes it so and deliberately with the H&H's. Pressure spikes were guaranteed using Cordite in the tropical heat so H&H designed the long cases to accept that and still give acceptable pressure.

Pressure will be somewhat less than the 06 with the same bullet.

The big advantage to the H&H isn't in hotter loads, it's in the longer neck for a better grip on heavier bullets.

The receiver hould take it in stride but the question I have is, will the short barrels be able to burn all the slower powder needed for the heavy bullets and I haven't even looked at the twist.

If you can't shoot 220 grain bullets, there really isn't any reason to do the H&H conversion.

[Sourdough]

Here, Here, Spanky.  I agree with you 100%.  Why take a good gun and ruin it.  Have been thinking about doing an AI on my 30-06 Handi, then decided, "No it works good now why ruin a good thing".   If I do that it will be one of my Savages, I forsee less problems there.

[peternap]

The 300 won't kill 'em any deader than the '06 so why ruin a good barrel.



Spanky

Why is rechambering ruining it Spanky.

It's no different than doing the Ackly improved routine.
The only rechambering I've seen here that has any real merit is the 44mag to 444 and 357 to Max. Even those you can say the same thing. The Deer won't know the difference.

That's part of the fun of the Handi's. You don't have to worry about action length. You can even use the 45/120's in them.

If it wasn't for the fun potential of Handi's, I wouldn't have one. The Deer sure won't know the difference between the 12 ga 2 3/4 and the 12FH or the Tri Balls III.

They sure won't know the difference between 45/70 out of my Guide Gun and the Handi barrel.
I doubt if they could tell you if they were shot with my 30/06 Handi or my Remington 700

I'm not sure where the limit really is on the SB2 but I was trying to see with one of my Ultra slug guns. When I reached loads that were topping 30,000 I quit with no damage. I can't imagine having a larger head than that so the pressure it will take with rifle cartridges is going to be hot to flex it.


OH...I have an EXTRA o6 barrel to play with. I like the way the one I'm shooting now, shoots.

[quickdtoo]

The 300H&H has about the same SAAMI MAP as the 308Win and 35Whelen, but a bigger case head of .513" compared to .470", try it for yourself, I doubt it will work well at full pressure loads, if all you can achieve is 30-06 velocities, why try?  I couldn't achieve 150gr 30-06 velocities with the 300WSM with several powders, but it has a lot bigger case head at .555", got the gap approaching 2900fps even with moly bullets, my SS 30-06 Handi shoots 150gr Fusions over 3000fps.  The 30-06 has a 1:10" twist, my 30-06 Ultracomp shoots the 200gr Nosler partition extremely well at ~2600fps.

Tim

http://www.leverguns.com/articles/saami_pressures.htm

[peternap]

The 300H&H has about the same SAAMI MAP as the 308Win and 35Whelen, but a bigger case head of .513" compared to .470", try it for yourself, I doubt it will work well at full pressure loads, if all you can achieve is 30-06 velocities, why try?  I couldn't achieve 150gr 30-06 velocities with the 300WSM with several powders, but it has a lot bigger case head at .555", got the gap approaching 2900fps even with moly bullets, my SS 30-06 Handi shoots 150gr Fusions over 3000fps.  The 30-06 has a 1:10" twist, my 30-06 Ultracomp shoots the 200gr Nosler partition extremely well at ~2600fps.

Tim

http://www.leverguns.com/articles/saami_pressures.htm

I couldn't find the SAAMI spec for the 300 Tim. I was using my 375 as a reference and it is low pressure for the bullet weight.
I'm trying to figure where the limits of theSB2 are. Geeeze, if it can stand 68 grains of Blue Dot with a 12 ga head diameter and a massive chunk of lead, you'd think it would take a .555 head at the high 50's and low 60's.

[knight0334]

The .300 H&H is 54,000 P.S.I/CUP.

The 12ga pressure is between 12.5K and 14.5K..   Thats a big difference from the 54K of the .300H&H.

[peternap]

The .300 H&H is 54,000 P.S.I/CUP

That sounds closer to what I thought Knight. Where did you find that. Since it was developed before SAAMI, all I had was No Standard.

[peternap]

The .300 H&H is 54,000 P.S.I/CUP.

The 12ga pressure is between 12.5K and 14.5K..   Thats a big difference from the 54K of the .300H&H.

Better recalculate, The pressure for that load in 12 ga is a measured 31,000 according to Precisions pressure gun.
That ain't a Dove load and the shells are showing excessive expansion then. When a shotshell shows expansion, it's close to the edge.

The 12 ga loads I'm putting together today are hot but not close to the 68 grains. Today gets 35 grains of Blue Dot and a 1311 grain slug.

[knight0334]

You're shooting a 12gaFH?

[quickdtoo]

I don't think there actually is a SAAMI MAP for the 300H&H as you mentioned due to being developed in 1925, but Hodgdon lists max pressures at 54KCUP which is NOT the same as 54kpsi, to see the difference, all you have to do is look at the CUP and PSI differences of the  308Win and 35 Whelen data on Hodgdon's website.

Tim

http://data.hodgdon.com/cartridge_load.asp

[Swampman]

The 300 won't kill 'em any deader than the '06 so why ruin a good barrel.



Spanky

Ditto!

[peternap]

You're shooting a 12gaFH?

I do have a 12FH but that load was in a stock Ultra and 3 inch shells (Multi hulls) . I was trying to see if it would come apart. It didn't.

[moorepower]

The true benefit of the H&H is it's ease of feeding due to its taper in a bolt action rifle. That's not going to mean much in a Handi. You may want to price brass also.