22-300 bunnyfkr - AR15.COM

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[ARCHIVED THREAD] - 22-300 bunnyfkr (Page 1 of 2)

Posted: 3/19/2017 9:40:06 AM EDT

Just going to leave this here, I did it for shits n giggles, and coz my mate said it couldn't be done. Now I just got to get a reamer made up

edit for title change.dryflash3

Second edit to remove first edit. dryflash3

Posted: 3/19/2017 9:56:19 AM EDT

[#1]

Maybe just a tad bit overbore....

Posted: 3/19/2017 11:22:06 AM EDT

[#2]

16 Cartridges to the Keg......

Posted: 3/19/2017 11:33:11 AM EDT

[#3]

Neck that to seventeen and you'll have something!!!

Posted: 3/19/2017 12:48:08 PM EDT

[#4]

The only hiccup is you'll need to replace the barrel before you're zeroed.

Posted: 3/19/2017 6:40:26 PM EDT

[#5]

Quote History

Quoted:
Neck that to seventeen and you'll have something!!!

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It was suggested, I'm thinking of it as my own version of Mr PO Ackely .22 earsplittingloudenboomer

Skip

Posted: 3/19/2017 6:40:34 PM EDT

[#6]

I hope you are using heavy 22 bullets

Like a 80 grain AMAX @ +3000 fps

Posted: 3/19/2017 7:01:32 PM EDT

[#7]

That's a 80grn vld sitting in it. Had suggestions of 55 b tips

The things you do for just shits n giggles.

Posted: 3/19/2017 7:31:18 PM EDT

[#8]

Get the reamer made and shoot it.

Posted: 3/19/2017 10:07:34 PM EDT

[#9]

Don't use the sx or blitz bullets with that puppy.

Posted: 3/19/2017 11:15:48 PM EDT

[#10]

Honestly, it looks fake. IDK, Photoshoped or something. The brass is off, maybe it's the aperture setting being so low. Take a picture of it with your cell phone, out side in the sun in your hand.

Or don't...

Posted: 3/20/2017 12:41:13 AM EDT

[#11]

Quoted:
Just going to leave this here, I did it for shits n giggles, and coz my mate said it couldn't be done. Now I just got to get a reamer made up

http://i1223.photobucket.com/albums/dd508/SKIPPYISAAUSSIE/Mobile%20Uploads/DB1DE083-CE9F-48A8-877B-3204F2A5ADA2_zpsg9lndjrc.jpg

View Quote

Video of the firing is REQUIRED!

Posted: 3/20/2017 2:01:53 AM EDT

[#12]

Quote History

Quoted:
Honestly, it looks fake. IDK, Photoshoped or something. The brass is off, maybe it's the aperture setting being so low. Take a picture of it with your cell phone, out side in the sun in your hand.

Or don't...

View Quote

Posted: 3/20/2017 2:02:50 AM EDT

[#13]

Quote History

Quoted:

Video of the firing is REQUIRED!

View Quote

Once the reamer is made and barrel fitted, sure thing.

Posted: 3/20/2017 2:10:05 AM EDT

[#14]

Now you need a 22-378 for those big bunnys

Posted: 3/20/2017 2:28:53 AM EDT

[#15]

edit: removed the off topic response

Posted: 3/20/2017 2:40:46 AM EDT

[#16]

I don't know what it is about your camera but all your pictures look fake. I know they are not but they look it.

Perhaps it's because your toilets flush the wrong direction?

Posted: 3/20/2017 2:55:18 AM EDT

[#17]

delete double post

Posted: 3/20/2017 3:02:41 AM EDT

[#18]

I shot kangaroos professionally for over a decade, was in the kangaroo industry for almost 15 years.

Never really took pictures on the job. But took a couple over the last few years here and there. The industry is pretty well dead in the State did the job. Moved to another state, but wasn't worth the time and or effort for little in return. So have it away.

Now I just do the odd contract work here and there. The 223 was a fantastic rifle for the job. Pretty much the main caliber for many in the trade.

There's no trick's here. All legitimate pics taken by me, take them how you will.

As to the 22-300 bunnyfkr it's real. I've almost finished another version of it.

Edit: removed the ghrapic images

Posted: 3/20/2017 3:04:52 AM EDT

[#19]

Oh, this is interesting.

Who do you get reamers from down there?

Posted: 3/20/2017 3:13:54 AM EDT

[#20]

No one locally I know of, PTG for the reamer and go and no go, and I'll make the dies or get CH4D to make them.

See how things go.

Posted: 3/20/2017 7:22:56 AM EDT

[#21]

Perfect!

Posted: 3/20/2017 9:27:42 AM EDT

[#22]

Wow. That thing looks like a beast.

Posted: 3/20/2017 5:21:30 PM EDT

[#23]

I should rename it to the .22-300 Barrelburner.

Posted: 3/20/2017 6:08:42 PM EDT

[#24]

I can see renaming it to be politically correct, but the 22-300 Bunnyfkr is just perfect for messing with ya Buds

Posted: 3/20/2017 6:12:12 PM EDT

[#25]

Needs more cowbell. How about a 22BMG or neck down a tank shell. Hmmm, at what velocity would a FMJ melt due to air friction...

Posted: 3/20/2017 8:08:47 PM EDT

[#26]

Disappointing. You sure you want to use an 80gr bullet? You'll need slightly tighter than a 1:9 twist to stabilize an 80gr SMK at 3860 fps. But if you get much tighter, you'll burn the barrel out too quick.

If the parent wasn't a 300 win mag, let me know. I'll try again. Or if you have a way to up the pressure.....

***edit
Of course, be sure to work up to this load. It's at max.

Posted: 3/20/2017 8:14:02 PM EDT

[#27]

I like it.

What would it do with a 55gr. bullet in a 1/12 or 1/14 twist barrel?

Posted: 3/20/2017 8:27:56 PM EDT

[#28]

Quote History

Quoted:
Needs more cowbell. How about a 22BMG or neck down a tank shell. Hmmm, at what velocity would a FMJ melt due to air friction...

View Quote

I think the 22BMG is a bust. Had to go to a 49" barrel to get the same velocity as the 223-300 BunnyFKR. Couldn't find a suitable propellant, 50BMG only fills the case 56% with 155.5grs at the max load.

Of course, always work up to the max load. Don't start here.

Posted: 3/20/2017 8:35:34 PM EDT

[#29]

Roy Weatherby did some experimental work with the .378 Weatherby necked down to a .22. I think that's about the limit for the bore size.

Posted: 3/20/2017 8:39:30 PM EDT

[#30]

Quote History

Quoted:
The only hiccup is you'll need to replace the barrel before you're zeroed.

View Quote

Beat me too it.

Posted: 3/20/2017 8:44:40 PM EDT

[#31]

Can it even burn all that? At some point does it just become a cutting torch?

Posted: 3/20/2017 8:47:34 PM EDT

[#32]

Quote History

Quoted:
What would it do with a 55gr. bullet in a 1/12 or 1/14 twist barrel?

View Quote

I went with the 52gr SMK HPBT because obviously we're concerned about accuracy and you need the boat tail for extended range. Since you're also hunting with it, I went back to the 32" barrel to make it more manageable in the field. You only need a 1:16 barrel to stabilize that projectile at 4,370 fps.

Once again, this is a max load. Work up to it for your own safety.

If you switch to a Hornady 40gr boat tail Vmax, you can get up to 4,650fps in the same rifle. But it is a compressed load.

Posted: 3/20/2017 8:55:27 PM EDT

[#33]

Quote History

Quoted:
Can it even burn all that? At some point does it just become a cutting torch?

View Quote

All the powder burns in the 49" 22BMG since it's only half full, but in the 32" 223-300 BunnyFKR, it only burns about 90%. But you need the extra to pre-roast the rabbit if you take a close shot. You could get 99.97% of the powder burned in a 10 foot barrel with a MV of 6,249 fps, but this is a varmint rifle and that would just be silly. Could you see that hanging off the back of a pick up?

Posted: 3/20/2017 8:56:24 PM EDT

[#34]

Holeeee you know what!

Serious question. Would the thin jacket of the little SMK hold up in the barrel at that velocity?

Posted: 3/20/2017 8:57:05 PM EDT

[#35]

This thread delivers

can't wait to see the final product

Posted: 3/20/2017 9:06:10 PM EDT

[#36]

The parent case is 300win-mag. My current 300 win mag load is 79.2grns of adi225 ( rebadged as Retumbo in the states ) for the 208amax. At 2905fps

I use the 80vlds in my other .223 tikka Fclass standard gun with a charge of 25.0grns at 2995fps

The action is a tikka t3 Tac so for the experiment I am at first going to use a used varmint profile barrel. The Tikkas are and have been quite popular here in Aus for a very long time. Most common are the 1-12t for 55pills and 1-8 for the 80vlds. so a standard length tikka barrel at first. After the test barrel/s are flogged out. I would use a new 30" kreiger,Maddox,tse, barttlen barrel.

My 300 barrel is almost shot, going to get a new barrel in Nathan Fosters 7mm practical. ( 7mm-300 ) and also my own 22-300 bunnyfkr/barrelburner, with 2 versions the first one and the improved shoulder.

There is a fair bit of mucking around to do this here in Aus.

The whole thing started out as a joke between mates, now it's going to go and become a reality. For many years I've wanted to get/do my own version of the POAkly's 22 earsplittingloudenboomer.

I can make the dies etc, but for the other work in Aus only a smith can do it. Slow process, but it will eventually get to the squeeze the trigger stage.

I've got another version with a improved shoulder that I am working on.

Posted: 3/20/2017 9:20:34 PM EDT

[#37]

Quote History

Quoted:
Serious question. Would the thin jacket of the little SMK hold up in the barrel at that velocity?

View Quote

The 17 Remington Fireball does 4,000 fps with a 20 grain bullet. According to wikipedia, the 22-250 does 4,224fps with a 40gr bullet and I'm assuming that's with a 1:14 twist barrel and a 40gr varmint bullet which is also going to be a thin skinned. If I've done the math right, the 22-250 is leaving the barrel at 3,620 revolutions per second or 217,234 rpm. The 223-300 BunnyFKR in a 32" 1:16 is only doing 3,168 revolutions per second or 190,080 rpm. I would think it stands a chance of working. Of course the OP will have to experiment with it. You could always go to a Barnes solid or something like that.

Posted: 3/20/2017 9:33:17 PM EDT

[#38]

Quote History

Quoted:

I think the 22BMG is a bust. Had to go to a 49" barrel to get the same velocity as the 223-300 BunnyFKR. Couldn't find a suitable propellant, 50BMG only fills the case 56% with 155.5grs at the max load.

View Quote

Okay, that's actually really interesting. Didn't think about the fact that a very light bullet would need a long barrel with that much powder. How heavy can a 22 cal bullet get? What if we made our own 3-4" long (BT of course).

Posted: 3/20/2017 9:37:07 PM EDT

[#39]

Here's the 52gr SMK with the max load of Retumbo.

At 4,341 fps in a 30" 1:12 barrel, you're getting 260,460 rpm which is more than anything else so far. These might blow apart at the muzzle.

Posted: 3/20/2017 11:33:17 PM EDT

[#40]

Guys. Smokeless powder has it's limits just like bows do. The powder can only burn and create pressure at a limited speed.

Velocity of around 4700fps is about all you can get no matter how big the casing is and how light the bullets are.

This is precisely why the military has been messing with electro magnetic guns.

Motor

Posted: 3/20/2017 11:35:11 PM EDT

[#41]

Well, it's a lot more practical than starting with a 378 sized action.

Tag for results. I believe Ackley achieved 4600 or 4800fps with a 50 grain if I remember right? I can't seem to find my book right now.

ETA: Probably should have googled it first. Looks like the .22 Eargesplitten Loudenboomer got to 4600 with a 50gr bullet.

Posted: 3/21/2017 12:16:22 AM EDT

[#42]

Friend of mine did something similar to the bunnyfkr but with a .243 bullet

Posted: 3/21/2017 12:54:04 AM EDT

[#43]

Quote History

Quoted:
Neck that to seventeen and you'll have something!!!

View Quote

Posted: 3/21/2017 2:06:29 AM EDT

[#44]

The improved 22-300 bunnyfkr with a 75amax seated in it.

Posted: 3/21/2017 9:46:56 AM EDT

[#45]

Any idea what the case capacity is now?

Just a thought, when you get the reamer made, you might blow out the shoulder a bit. You don't need that much neck for a 223 bullet.

Posted: 3/21/2017 8:36:08 PM EDT

[#46]

I am pretty sure some one makes a 90 grain 22 bullet

Just Google it and they make a 100 grain 22 bullet also

Posted: 3/21/2017 10:13:03 PM EDT

[#47]

Those are some low efficiency numbers.

I bet a 308 case with a sharp shoulder necked down to a 22 would be nearly as fast.

Posted: 3/21/2017 10:23:16 PM EDT

[#48]

Quote History

Quoted:
Those are some low efficiency numbers.

I bet a 308 case with a sharp shoulder necked down to a 22 would be nearly as fast.

View Quote

Thats the .22-243 Middlestead.

Posted: 3/21/2017 11:41:02 PM EDT

[#49]

Use a CFE powder...

Posted: 3/21/2017 11:44:33 PM EDT

[#50]

Sure it's way over bore, sure there's probably no point in doing it, sure it's going to burn barrels etc etc

But throughout history there have been those that gave there middle finger to those and just did it anyway.

Whilst some succeeded and some failed .... they gave it a go.

This all started out for some shits n giggles. There may never be any practical use for it. But just to prove a mate wrong, why the hell not.

I'm doing this for Me, nothing more. I don't expect this round to catch on, as mentioned it was born mainly for shits n giggles.

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[ARCHIVED THREAD] - 22-300 bunnyfkr (Page 1 of 2)

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