Author Topic: 204 to 20-06 Rechamber? (Read 4042 times)

Couger · « **Reply #30 on:** February 18, 2010, 08:33:02 AM »

Quote from: trotterlg

I need to commend Accurate Powder for their excellent customer service. I received this information from them about a load for the 20-06 using AA 8700 which is discontinued now. Here it is, so if anyone has questions, they are the place to go to I would say.

Thanks for the comments and data about Accurate Powder.

What kind of steel is your barrel made of?

Hopefully you'll get a "career" out of shooting that thing and not just a short experimental season.

But when the rifling begins to show wear, have you thought about what bigger bore to go to?

How about a .375 or .400 or .411 "Brown-Whelen?"

I used to know a fellow who wanted to make a .375 "Hawk," (essentially a "Gibbs" type cartridge). Never heard whether he actually did it, and if so if it turned out okay.

Goatwhiskers · « **Reply #31 on:** February 18, 2010, 10:40:02 AM »

My memory is slipping. I was thinking the "loudenboomer" was the one that was the .50BMG necked to .17 caliber. Developed for hunting the elusive nauga using a 20gr.hp bullet. Velocity was calculated at about 20,000fps but was considered a failure as one shot had blue nauga-hide hanging out of the trees. Goatwhiskers the Elder

moorepower · « **Reply #32 on:** February 18, 2010, 11:58:28 AM »

A 20 br will push 39-40 grainers at 39-4000 and 32 grain at 43-4400. If they are shot too rapidly the throat gets washed out real quick. The .204 barrels have shallow lands.

trotterlg · « **Reply #33 on:** February 18, 2010, 02:07:52 PM »

This has a factory Remington 204 takeoff barrel on it, I was thinking that if I Had used a Handi rifle for the project I would be done by now, but I am getting close. This is picture of the barreled action. Larry

Couger · « **Reply #34 on:** February 19, 2010, 06:13:22 AM »

Quote from: trotterlg

This has a factory Remington 204 takeoff barrel on it, I was thinking that if I Had used a Handi rifle for the project I would be done by now, but I am getting close. This is picture of the barreled action. Larry

Interesting, Larry.

Is that a 24 or 26inch barrel? Either way that will indeed be a "hard" steel barrel! (4140 or similar designation I'd guess). Every millimeter of length will be vital to enhancing complete powder burn and highest velocity.

How much of the chamber-end of that barrel will you loose as you mill and prepare it "to stubb?"

And when you do stubb it, what are you using for a donor [stubb] barrel?

trotterlg · « **Reply #35 on:** February 21, 2010, 04:53:46 PM »

This one is a 24 inch barrel, I would not stub a 20-06 into a H&R stub, I don't think you could get the chamber thickness you need. It would make an excellent rechamber for a .204 Ruger H&R barrel, it is dead easy. I also learned a little trick tonight, nto totally Handi related, but in loading up the first batch of 20-06 ammo I discovered that, if you take the expander ball out of the sizing die, it makes an excellent crimp die. Just put the loaded round in the sizing die and pull it down until it firmly bumps the neck, you end up with the nicest crimp you have ever seen. Larry

tykempster · « **Reply #36 on:** February 21, 2010, 05:18:42 PM »

Bye bye, barrel.

tykempster · « **Reply #37 on:** February 25, 2010, 10:06:30 AM »

Any new info? Is this project gonna happen?

trotterlg · « **Reply #38 on:** February 25, 2010, 05:43:03 PM »

It is most finished, I even have brass formed and ready. I have to inlet the stock some to fit the new barrel, but there isn't much else to do. I have lots of little projects going, I am nearly done with a 17 Hornet Savage 340, and I just cut a chamber in a 17 HMR Handi Rifle barrel tonight, and it looks like I need to finish off a 35 Remington in a couple of days. Funny how things just show up in the mail. Larry

Smoke Wagon · « **Reply #39 on:** February 25, 2010, 08:39:08 PM »

Larry,
am awaiting with abaited breath for the results.

rhbrink · « **Reply #40 on:** February 25, 2010, 11:01:07 PM »

Me too!

Inrut24/7 · « **Reply #41 on:** February 26, 2010, 11:32:19 AM »

The berger bullets might hold together, I assume your barrel is the standard 1-12 twist, this would be real interesting is it was a 1-10 or 1-9 twist shooting the 50 grain berger.

tykempster · « **Reply #42 on:** February 27, 2010, 01:55:49 AM »

I will attempt to show what I think this will look like when fired.

tykempster · « **Reply #43 on:** February 27, 2010, 02:02:20 AM »

My "handiwork"-

myarmor · « **Reply #44 on:** February 27, 2010, 03:26:32 PM »

Larry, what action are you useing for this project?

-Aaron

trotterlg · « **Reply #45 on:** February 27, 2010, 03:33:02 PM »

It is a Steyr M-95 straight pull bolt.

Larry

trotterlg · « **Reply #46 on:** March 09, 2010, 04:19:28 PM »

Got it ready to go and loaded up some rounds. I still have the reamer, so if anyone wants to try this in a Handi let me know, in a day or so I will fire a few down range, but I bet a 20-06 Handi would be the only one in the world. Larry

PHATINJUN · « **Reply #47 on:** March 10, 2010, 08:02:35 AM »

I may of just missed my chance at one by a few minutes in the classifieds

Kurt

trotterlg · « **Reply #48 on:** March 10, 2010, 02:27:30 PM »

I put 6 rounds through it today, nothing bad happened at all, the primers and cases look just like what a factory 25-06 would look like when fired. I would not be afraid to shoot this in a Handi Rifle at all, plus, there are factory ejectors and extractors for it, so it would just be a plain rechamber. Forming brass is one pass through the die and it is done. I will shoot a target next time and try to get a velocity reading. There is a considerable muzzel flash and more recoil than I thought. The two case heads are: Left 60gr, Right 57gr. Larry

knight0334 · « **Reply #49 on:** March 14, 2010, 08:11:02 AM »

Holy overbore Batman!

You'll be able to shoot those varmints at 1000yards, and fry all those in between with that combination rifle/flame thrower.

trotterlg · « **Reply #50 on:** March 14, 2010, 12:47:42 PM »

Shot it over the chronograph today, 60gr of H 1000 and a 34gr bullet got 4,091fps. I can fit one more grain of powder in the case and then I will have to go to a faster powder. I should probably have a much longer barrel on this rifle, but the price was right. I would guess it may be able to touch 4,500fps with a long barrel on a modern action, I may just have to give it a try. Larry

briannmilewis · « **Reply #51 on:** March 15, 2010, 08:29:23 AM »

Expected barrel life?

trotterlg · « **Reply #52 on:** March 15, 2010, 10:36:11 AM »

Just doesn't matter. Larry

MSP Ret · « **Reply #53 on:** March 15, 2010, 10:38:54 AM »

Hoo-rah!!!! I like that straightforward answer....Carry on!!!....<><....

mtbugle · « **Reply #54 on:** March 15, 2010, 10:40:35 AM »

could be an insightfull science project to see how long would last. 2 lbs of powder?

Spanky · « **Reply #55 on:** March 15, 2010, 01:59:05 PM »

Great work Larry.

Spanky

trotterlg · « **Reply #56 on:** March 15, 2010, 05:23:49 PM »

I would push it harder, but it is on an action built in the 1800's so I think I may be at the limit now. I may pick up some Varmint gernades which are a little lighter and see how fast they go, probably 4,200 to 4,300? If this were on a Handi action I would just keep loading it up until it wouldn't open after I shot it. Larry

gcrank1 · « **Reply #57 on:** March 15, 2010, 05:41:33 PM »

OMG!!!
Do you get that weird disconnect 'impression' that the bullet gets there before you completely pulled the trigger?

trotterlg · « **Reply #58 on:** March 15, 2010, 06:38:29 PM »

Believe it or not, even with 34gr bullets I have a big bruse on my sholder from shooting this thing. Larry

Spanky · « **Reply #59 on:** March 15, 2010, 06:58:50 PM »

Larry,

What would you compare the recoil of this cartridge to?
I would imagine it's pretty sharp.

Spanky