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6.5 ultra mag ballistics?

 
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  #1  
Old 02-25-2005, 11:06 PM
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6.5 ultra mag ballistics?

Kirby do you have any ballistics for your 6.5 KAM? Is it essentially a 6.5 ultra.If so can you neck down A 7 mm ultra for what You are doing? I am interested in building one on a left handed Bat Action ( remmys Hard to come for us southpaws) anything I need to know before i start my adventure? also what is the largest wildcat bullet for the 6.5?
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  #2  
Old 02-26-2005, 02:58 PM
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Re: 6.5 ultra mag ballistics?

D-a,

The 6.5mm Allen Mag is based on the 338 RUM case which is shorter then the other three RUM cases by 0.090". I used this case because I wanted to sharpen the shoulder angle and if I did this with the longer cases, the case capacity would be to large for the 6.5mm bore.

As is the 6.5-338 RUM holds around 116 gr or H-335 filled to the case mouth, the fireformed 6.5 Allen Mag will hold right at 123 gr.

Ballistically, you will get the following with a 30" barrel:

100 gr...............4100 fps
120 gr...............+3800 fps
140 gr...............+3450 fps


Wildcat Bullets is as we speak designing bullets for the Allen Mags that will weigh 169.5 gr and have a B.C. in the mid .900 range!!!

These have yet to be tested though.

I will be supplying prenecked, annealed brass for $38.00 per 50. All you will need to do is fireform, trim and your ready to roll.

Dies will be in stock from me in May.

Good Shooting!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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  #3  
Old 02-26-2005, 03:12 PM
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Re: 6.5 ultra mag ballistics?

Gotta question- could be way off base here but 116 gr of H335 sounds like to me it would blow up something in such an overbore case. I guess what I am trying to say is, isn't H335 a bit fast for this round? Maybe a typo- or did I miss something?
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  #4  
Old 02-26-2005, 07:51 PM
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Re: 6.5 ultra mag ballistics?

Kirby, who do you get to make your reamers? I was thinking about a manson removable pilot. Also what shoulder angle are your cases and how much taper does the case have?

Thanks D-A
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  #5  
Old 02-27-2005, 09:33 AM
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Re: 6.5 ultra mag ballistics?

Chris,

I think Kirby was just making a comparison in case capacity between a simple necked 6.5/338 RUM case and that of his IMP design, H335 was just used as a capacity example instead of water.
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  #6  
Old 02-27-2005, 09:56 AM
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Re: 6.5 ultra mag ballistics?

Chris,

You are 100% correct, I just used this powder to get an idea of case capacity comparing the virgin case with the fireformed. I generally use BLC-2 but did not have any on the bench. H-335 settles so evenly and consistantly it does nearly the same job.

Just easier to use powder then water, especially in cases I want to load up "now".

You are right, NEVER USE H-335 IN THE ALLEN MAGNUMS!!!

Sorry for the confusion should have stated this in the original post.

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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  #7  
Old 02-27-2005, 10:01 AM
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Re: 6.5 ultra mag ballistics?

D-a,

Not to be a snit about it but I can not tell my shoulder angle, keeping it secret. Will say that body taper is very min, roughly 0.012" over the length of the case body. Can be tricky to chamber with such min taper, lots of time, lots of oil and mostly lots of patients to get perfect chambers.

Manson will make you a fine quality reamer, as will any of the other top name reamer makers, I use JGS exclusively and have never been disappointed.

I would highly recommend them.

Also, a live pilot reamer is the only way to go for extreme accuracy in a rifle. Also get a full set of pilot bushings or at least the ones you will need for your barrels bore diameter. Use as large a pilot bushing as possible while still allowing an easy slip fit into the bore.

Good Shooting!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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