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New Allen Magnum and APS rifle design finally ready to test....

 
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Old 01-31-2006, 09:01 PM
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New Allen Magnum and APS rifle design finally ready to test....

To all,

Well, I just finished the first 277 Allen Magnum to come out of APS. This new Allen Magnum was designed at the request of my good friend Richard Graves with the intent of him building a very large 185 gr ULD RBBT speicifically for this new chambering.

Basically, the 277 Allen Mag is nothing more then the 7mm Allen Mag necked down to 277 with no other changes. Performance with same weight bullets will be roughly 150 fps over what the 270 Allen Magnum will produce as the 277 AM is based on the slightly larger and much stronger 338 Lapua parent case.

The new round is not the only unique thing about this rifle. This rifle is the very first design of my Extreme Sporter V-Block rifle system.

The idea was to take the design of the Heavy V-Block but modify it and streamline it to work in a rifle in the 10-12 range instead of 25 to 30 lbs for my Heavy V-Blocks. And doing this while still offering the extreme stability that the V-Block barrel bedding system offers as well. The stock design of choice for this system was the McMillan A-5.


This pic shows the stock with the V-Block bolt ports milled in the stock and the V-Block attached to the barrel next to the stock, showing how it will be positioned in the stock when finished. As with the Heavy V-Block, the Xtreme Sporter V-Block has a totally free floated receiver. Nothing behind the recoil lug bares solidly on the stock in any way. The barrel is held solidly into the V-Block by two 1/4-28 bolts.


The main issue with the Xtreme Sporter V-Block is that the block needs to be dimensioned to fit into the slimmer forend of the A-5 which requires alot of machining and tapering of the Block. I wanted as much metal in the block as possible to retain rigidity and stiffness but was limited in what the final shape could be. The final result looks like it will be plenty stiff for extreme accuracy.


This is the finished rifle ready for load development and range testing. Componants are a Rem 700 LA converted to single shot, fully accurized, Holland Comp recoil lug, Special Lilja Xtreme Sporter V-Block contour barrel, 30" fluted 1-8 3 groove. Holland QD brake, McMillan A-5 stock, Rifles Basix 1.5 lb trigger and APS V-Block.



Finished rifle weight is roughly 13.5 lbs as she is seen in the pictures. Certainly not a lightweight sporter but if the system performs as it should, the rifle will produce consistancy far above what a conventional 13 lb rifle will produce.



Performance wise, we are looking to break 3500 fps with the 169.5 gr ULD RBBT and hopefully get the new 185 gr ULD RBBT up to the 3300 fps range. If we can get this, the 277 AM will rival the 7mm AM/200 gr ULD RBBT combo ballistically.

As with all the Allen Magnums, these are Full throttle big game rifles, not varmint rifles so the shortened throat life is much less of a concern then a high volume shooter.



This rifle was designed and built, along with the new round to reach out and hammer Canadian whitetails out to 1000 yards reliably in a portable rifle system. Hopefully it will do this easily.

All opinions welcome if you care to share your thoughts on this idea.

Good Shooting!!

Kirby Allen(50)
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Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

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Web Page: www.apsrifles.com

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Old 01-31-2006, 09:35 PM
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Re: New Allen Magnum and APS rifle design finally ready to test....

Very impresive setup
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Old 01-31-2006, 09:36 PM
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Re: New Allen Magnum and APS rifle design finally ready to test....

Kirby:

Fantastic [img]/ubbthreads/images/graemlins/smile.gif[/img] [img]/ubbthreads/images/graemlins/shocked.gif[/img] [img]/ubbthreads/images/graemlins/smile.gif[/img] I've been waiting for this to show up and it looks like it all came together as planned.

I don't think Richard will be wanting for anything when he gets his hands on this. One thing for sure, this means the 277 cal guys will be getting their heavier bullets pretty quick. [img]/ubbthreads/images/graemlins/smile.gif[/img]

I like the looks and had wondered what the final v-block design would look like. I like it. I'm really curious to see how the accuracy is with the new system and I have no doubts about it's capabilities to hammer a whitetail about as far as Richard can see one. Keep us posted with the range results.

Don't know if I'll show this to my buddy or not. He's shipping his 270 AM to you this week and he might be tempted to have it re-chambered but I think he'll more than likely wait until it's time for a new barrel.

At this weight limit for the gun do you think the accuracy and consistency of the gun will be equal to or greater than a conventionally bedded rifle?

From the chamber/block area forward, what is the barrel contour comparable to? #7, #8???

How heavy, and what length of a barrel would this system handle if utilized in a standard type stock such as the A-5?

Again, great looking gun and I congratulate Richard on his new gun and you on your continued work to make a better long range hammer and also in finding a new way to keep us broke [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/smile.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]
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Old 01-31-2006, 10:04 PM
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Re: New Allen Magnum and APS rifle design finally ready to test....

There you go again, posting pics and making want another rifle [img]/ubbthreads/images/graemlins/mad.gif[/img]!

I have no doubt that those Canadian deer are in some serious trouble. Can't wait to see what she does w/those big 185 gr bullets!!!

Of course, I can't wait to see what wimpy little 270 AM will do w/them as well!!
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Old 01-31-2006, 11:31 PM
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Re: New Allen Magnum and APS rifle design finally ready to test....

[ QUOTE ]
'This rifle is the very first design of my Extreme Sporter V-Block rifle system... The idea was to take the design of the Heavy V-Block but modify it and streamline it to work in a rifle in the 10-12 range instead of 25 to 30 lbs for my Heavy V-Blocks. And doing this while still offering the extreme stability that the V-Block barrel bedding system offers as well.... As with the Heavy V-Block, the Xtreme Sporter V-Block has a totally free floated receiver. Nothing behind the recoil lug bares solidly on the stock in any way. The barrel is held solidly into the V-Block by two 1/4-28 bolts.'

[/ QUOTE ]

I did a search to see if anyone else has asked the question, but have not seen this asked before... you mentioned free-floating the receiver past the recoil lug? This doesn't cause any issues with the scope i.e shifting POI? I take it / assume that the v-block abosorbs the stress and energy from recoil, so a receiver doesn't have to be bedded in.... or that the recoil lug takes any of the residual stress for the receiver. Sorry, just a little curious... it looks way cool (as my son would say). The v-block, I gather from the previous posts, is for long, heavy barrels that you would not want to free float (and stress the action/receiver with, thus getting poor accuracy). Looks like a good concept and application!

I can see this in my gun safe in the next year or two... or better yet at the range instead of the safe! Can't wait to hear about accuracy out to 400-1000 yards, looks like it will be really neat.

Congrats to Richard!

EZ
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  #6  
Old 02-01-2006, 06:43 AM
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Re: New Allen Magnum and APS rifle design finally ready to test....

WEll I talked to him the other day and we discussed who's would be ready first. LOL

I have to admit that it really turned out great. Not that I had any doubts.

I am sure that this rig should have no problems dumping a big whitetail with a properly stoked up 185 gr Wildcat.
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Old 02-01-2006, 06:44 AM
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Re: New Allen Magnum and APS rifle design finally ready to test....

[ QUOTE ]
Can't wait to hear about accuracy out to 400-1000 yards,

[/ QUOTE ]

I'm thinkin' 1000 out towards 2000. Should still have enough umph to do in a chuck or yote.....

Several questions though:

a)V-block "glued" into the stock?
b)Necessity of recoil lug? Safety or part of design?

and




Why are ss7mm's eyes buggin' out so far? Looks like they are even a little red from a restless night since Kirby posted those pics. [img]/ubbthreads/images/graemlins/blush.gif[/img]
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