Author Topic: 25-06 to 25 ACP chamber adaptor (Read 2278 times)

trotterlg · « **on:** September 14, 2009, 04:20:33 PM »

I got Quicks 25-06 to 25 ACP chamber adaptor roughed in tonight. I am thinking on how to make a removal tool and how to extract the spent 25 ACP cartridges without removing the adaptor each time. I think I will cut an "O" ring groove near the sholder to hold it in the chamber and help keep it centered up, I will machine up the chamber end tomorrow and cut the ACP chamber in it. This is a piece of 22 RF barrel that I put a .251 hole through for the 25 ACP round. IT is built like a Head Space gauge is made so that there is no need to do the long taper of the case. We will see how it turns out, hope to have it done in time for Elk season for Tim. Larry

tykempster · « **Reply #1 on:** September 14, 2009, 04:40:25 PM »

Too cool!

The pressure of the 25 may be low enough if the chamber is polished enough that the empty may just fall out?

dk17hmr · « **Reply #2 on:** September 14, 2009, 04:49:23 PM »

I have thought about making a 11.5" with a 5.5" flash hider 25 ACP barrel for shooting squirrels and rabbits. Do you have a chamber reamer?

chipmunk · « **Reply #3 on:** September 14, 2009, 04:53:48 PM »

I'm imagining some cool system where a specially designed piece essentially transfers the extractor's movement to the 25 acp round and extracting it. Though this idea is probably flawed. I think any attempt to use the extractor would likely mean the whole adapter would be moved backwards instead of removing the case from the adapter.

I might put some thought into this in a second.

trotterlg · « **Reply #4 on:** September 14, 2009, 05:07:43 PM »

The 25 ACP is a straight case at .278. I have a straight .283 reamer I will run in to the proper depth. The 25 ACP has a tiny rim, so if the chamber is fairly tight it will seat on the rim. On the 22 Hornet 12 gauge barrel insert I made I transfered the 12 gauge ejector through into the hornet case, that is a lot of mechinism in a small space, I don't think I could do it with anything less than the diameter of the 12 gauge chamber. I will stay simple with this one I think. Larry

quickdtoo · « **Reply #5 on:** September 14, 2009, 07:31:45 PM »

I checked a bullet in the muzzle, it slips right in, I was concerned that it might be just tight enough to get stuck mid bore since the bullet is too small to create a gas seal at .251", and the chamber not being sealed either, but as loose as it is, it should at least exit, but probably won't be very accurate. Are you sure you want to go to all the work Larry?

Tim

trotterlg · « **Reply #6 on:** September 15, 2009, 03:29:19 AM »

It is more than half way there now. I am working some this week, so I will be a little slower, but it shouldn't take more than a few of more hours, should have it done by the end of the week at the latest. I think I will do a final ream on the adaptor to .2505 to get a good seal on the bullet and get a little speed up before it transitions into the barrel, I think the adaptor it's self makes a longer barrel than my little pistol has. Larry

petemi · « **Reply #7 on:** September 15, 2009, 03:53:30 AM »

Larry, I think it's a great plan and should work well. Good luck to both you and Tim with the project. It's a very special thing to be doing something extra for Tim. You're obviously a very kind and skilled person.

Pete

quickdtoo · « **Reply #8 on:** September 15, 2009, 04:46:02 AM »

I appreciate your effort Larry, this will be interesting. Dad compared the penetration in a 2x4 of the little round from his Raven pistol and a comparable 22Lr pistol, the .25 did a poor job in comparison and dad wasn't real impressed, but it oughta kill a grouse at 15yds if it's accurate enough, body shots with a 22Lr have always been fatal to the tasty fowl and don't tear up the meat like a big game round. I think I'll convert the 25-06 Ultra to an extractor tho, I'd hate to get the adapter stuck in the chamber in the middle of a hunt!!

Tim

bill439 · « **Reply #9 on:** September 15, 2009, 05:44:03 AM »

I sure hope this will work. I thought about doing something like this many yrs. ago and chickened out because of the different bore size. .251 vs .257 maybe it won't make much difference and will be accurate for your use. Wishing you the best. Bill439

PHATINJUN · « **Reply #10 on:** September 15, 2009, 06:35:23 AM »

I was wondering if the little 25 would even have enough pop to get out of the 26" bbl. ? Kurt

spooked · « **Reply #11 on:** September 15, 2009, 07:10:16 AM »

mayhaps soft cast lead would work, with enough kick to bump it up to bore size..I've always thought that a 25 acp would make a good reloadable substitute for th .22 lr. I believe you are going to be pleasantly surprised with Larry's adaptor..

quickdtoo · « **Reply #12 on:** September 15, 2009, 08:37:35 AM »

I've never been surprised by Larry's work, it's always been done top notch and functions flawlessly.

I dunno if I'd want to shoot cast in it, then have a 300yd big game opportunity and have the round go somewhere other than where it was supposed to due to the fouling, that would take some thorough testing to find out. I kinda have my doubts there's enough powder capacity in the case to bump it up that much with normal loads, but handloaded hotter may be the trick which could be bad news if a hot round got in another firearm.

Tim

tykempster · « **Reply #13 on:** September 15, 2009, 10:24:16 AM »

I don't think it would get enough speed on the bullet to leave much funky fouling, but you could get a very light .257 cast bullet, or even a v-max or something if you got a larger expander ball for the 25 ACP.

NOW YOU GOT ME THINKIN!

quickdtoo · « **Reply #14 on:** September 15, 2009, 12:43:47 PM »

I do, specially if it's just snug enough for the bullet to not quite follow the rifling and skip thru the bore instead of following the twist. I don't plan on buying any reloading dies for the 25ACP, just shoot what ammo I have, so maybe someone else should do the testing that can give it a sporting chance.

Tim

trotterlg · « **Reply #15 on:** September 15, 2009, 03:58:47 PM »

I worked a little longer than I wanted to today, but I did make some progress. I chambered it (probably a little short) and cut away the portion that the ejector would catch on. My intention is to make an extractor tool for removing it from the chamber. To head space it, I will just machine away the smaller diameter under the rim of the .25 cartridge (you can see one chambered if you look close) until I get about .005 or so to the Handi breach face. I will also put two little slots in the small diameter part that will allow an extractor tool to pop out the empty if it doesn't fall out by it's self. I still have to cut a chamber in a chunk of barrel to headspace this with because I don't have a 25-06 barrel, but I do have a .270 Reamer, and that has the same dimensions and sholder angle, so I will use that. Not much else, I have to work again tomorrow and it includes a chase flight, so I don't know if I will get any more done until the day after. Larry

quickdtoo · « **Reply #16 on:** September 20, 2009, 07:21:35 AM »

Larry,

My best friend cleaned out his gun room and found 3 boxes for .25 ammo and has no gun to shoot it, so he's giving it to me if you still want me to do some testing.

Tim

LaOtto222 · « **Reply #17 on:** September 20, 2009, 07:36:50 AM »

I have a question, Larry. Is the chamber adopter forward of the chamber rifled? if it is, I would think it could have potential of being accurate. With no rifling and being smaller in diameter than a .257 bore i would think it would not take the rifling and shoot straight out the barrel without spinning with a great chance of tumbling when it came out of the bore. Just some thoughts

I have thought at different times of converting a single shot 22 bolt gun to 25 ACP. I always talked myself out of it, thinking there would be no advantage to a 25 ACP over the 22 LR other than being reloadable. I am not sure if there is even a source for .251" barrels. Good Luck on the adapter, I hope it works well.

45-70.gov · « **Reply #18 on:** September 20, 2009, 07:55:04 AM »

i beleive i would get a cheap lee die and reload

with proper sized slugs hard cast and heavy for 25 acp

over all length is a mute point...dought you could get over pressure in that case

heavy slugs are quieter

factory 25 acp still work in a pinch

but that is a lot of work

not to take the SIMPLE step of krafting some nice ammo for it

might even be a close range deer killer if it did get stuck

trotterlg · « **Reply #19 on:** September 20, 2009, 09:55:06 AM »

The barrel in front of the chamber is smoothe, we will see how it works. It is mostly done now, I will post some pictures later, I had to go find a different Pickup today, the old one just finally gave up. Only thing that would make a .25ACP better than a .22rf would be, that in Washington State, you could hunt Bear and Elk with it. Larry

tykempster · « **Reply #20 on:** September 20, 2009, 11:59:13 AM »

Lol I hope that last comment was a joke!

But you could probably get a 100 grain bullet to 1000 in the 25. Essentially barely barely have the bullet in the case since it's not gonna be supported upon firing anyways.

quickdtoo · « **Reply #21 on:** September 20, 2009, 01:03:59 PM »

Tyler,

What Larry is referring to is according to Washington regs a rifle chambered in 25 ACP would be legal to hunt elk with!

Tim

http://wdfw.wa.gov/wlm/game/hunter/huntregs2009.pdf

Page 62…..

Modern Firearm Regulations
Rifles:
Big game, except cougar, must be hunted with
a minimum of 24 caliber (6mm) centerfire rifle.
Cougar may be hunted with 22 caliber centerfire
rifle.

trotterlg · « **Reply #22 on:** September 20, 2009, 01:15:58 PM »

Sort of an inside joke here in WA state, it is legal to shoot an elk with a 25 ACP rifle but not legal to shoot it with a 220 Swift, goes to show you the intelligence level of the people writing the laws. I cut a little slot to use to extract the case and drilled a hole opposite it to use to extract the insert, I will make a little tool to do both and then ship it off to Quick to test. The groove at the front is for an "O" ring, it will hold it in the chamber and also seal it from the hot gasses, remember, the adaptor cannot expand to seal the chamber like a cartridge does. This is a business someone could start on their kitchen table, there is nothing I have done here that could not be done with a $350.00 mini lathe from Harbour Freight, and there seems to be a huge intrest in them. If I wasn't old and otherwise distracted I would probably have a go at it. Raw material is just dead barrels, add a couple of reamers and you could knock these out all day long. Larry

quickdtoo · « **Reply #23 on:** September 20, 2009, 01:46:01 PM »

Looks good Larry, I have a range trip planned in the next week or two, huntin season is comin up real quick!!

Tim

mitchell · « **Reply #24 on:** September 20, 2009, 04:46:10 PM »

i've been thinking about doing this same thing only with a 30 carbine shot out of a 308.

larry did you just use a old hunk of a take off barrel???

dk17hmr · « **Reply #25 on:** September 20, 2009, 05:37:16 PM »

Quote from: tykempster on September 20, 2009, 11:59:13 AM

Lol I hope that last comment was a joke!

But you could probably get a 100 grain bullet to 1000 in the 25. Essentially barely barely have the bullet in the case since it's not gonna be supported upon firing anyways.

That would be pretty hard to do I think. I think you could probably push a 35gr to 1200fps though, which would knock the snot out of squirrels and rabbits.

trotterlg · « **Reply #26 on:** September 20, 2009, 06:25:08 PM »

I have a 30 carbine reamer, I may do one up while I have a .243 barrel here to check the adapter fit, I do use a chunk of barrel for the adapter, this one was a .22 rf barrel, I will try doing the 30 carbine also if this works. Larry

blackpowderbill · « **Reply #27 on:** September 21, 2009, 01:34:27 AM »

Would a .32 S&W / 30-06 work. It sure would be cheap to reload.

clearwater · « **Reply #28 on:** September 22, 2009, 09:30:37 AM »

Quote from: blackpowderbill on September 21, 2009, 01:34:27 AM

Would a .32 S&W / 30-06 work. It sure would be cheap to reload.

Handload cast with faster powder for much the same effect.

Course you wouldn't have a cool gadget to dream up.

mitchell · « **Reply #29 on:** September 22, 2009, 01:43:24 PM »

i got two project going on right now after there are done and my lathe is free again i may have to rent the 30 carbine reamer from ya