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270WSM 169.5grn Wildcat range test

 
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  #22  
Old 11-28-2005, 11:29 PM
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Re: 270WSM 169.5grn Wildcat range test

Txhunter,

The 270 Allen Mag is basically your wildcat but improved to the Allen Mag shoulder angle and body configuration.

Velocity with the 169.5 gr ULD RBBTs is running in the 3300-3400 fps range depending on barrel length. 140 gr Accubonds can be driven to a bit over 3600 fps with top loads.

From my bullet drop testing over 1000 yards, I come up with a BC value of .740 at 3300 fps but again this is from bullet drop measurements only.

Kirby Allen(50)
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Kirby Allen(50)

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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

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  #23  
Old 11-29-2005, 12:09 AM
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Re: 270WSM 169.5grn Wildcat range test

I am currently pushing 135MK about 3820fps with 30" barrel, but would not hessitate to try 169.5gr projo @33-3400fps. This I think I must try.
What particular powders have you had the best results with so far. I've been using WC872 along with 5010 and have now moved on to AA8700. The last seems to be the best "slowest burning" that is. Have some H50BMG on the way, will see how it does.
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  #24  
Old 11-29-2005, 08:46 AM
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Re: 270WSM 169.5grn Wildcat range test

Me and Bill Bailey were the first to guys to buy the 270 Allen Mag and every day this rifle seems to amaze me more.

We are using WC872 powder in them loaded up to 104grs right now but I will tell you that I am gonna step back to 103gr next time I load, 104 is a little hot on warm days

Hodgon is coming out with a extreme ball powder called US869, I think, this might be just the ticket for these rounds.

take it easy
steve
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  #25  
Old 11-29-2005, 08:51 AM
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Re: 270WSM 169.5grn Wildcat range test

Kirby,
man I cant wait to get some of those 185's. Are they gonna be a open meplat like the 169's or more closed like your 7mm 200gr???

That would be amazing to get a 277 bullet with a bc above .8 or even close to .9

Is spring still the earliest we are gonna get these bullets or is Richard looking for some test subjects [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]

if he is I think I know some lab rats who might throw their hats in the ring.

take it easy
steve
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  #26  
Old 11-29-2005, 03:38 PM
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Re: 270WSM 169.5grn Wildcat range test

Txhunter,

I have hit 3850 fps with the 130 gr Ballistic Tip and thats all the harder I pushed the issue. Not a max load but plenty for me. THis was mainly for simple R&D as I much prefer a bit more bullet weight in this size case capacity.

With the 130-140 gr bullet weights, 8700 seems to be about right depending on the burn rate of the specific lot of powder. I have seen some as slow as H870 and others as fast as Retumbo in burn rate.

For the 169.5 gr ULD I prefer WC872 as its a bit slower then 8700. It may be a bit on the slow side but works very well with not alot of pressure concerns. With the 185 gr ULD RBBT this powder may be the best choice of all.

Richard and I are currently working on a system to DRAMATICALLY improve throat life. I just got the materials to test this and will be reporting soon as to its effectiveness. May add 800 rounds to the barrel life of a round such as the 270 AM or your 270-300 RUM.

As Lerch already stated, Hodgdons new to be released US869 may be the best powder yet for this class of round if it is as stable to temp changes as they are advertising. We will see, it will certainly get tested in my rifles.

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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  #27  
Old 11-29-2005, 03:40 PM
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Re: 270WSM 169.5grn Wildcat range test

Lerch,

I do not know for sure what meplat the 185 will have. If I had to guess it will be a closed tip such as the 200 gr 7mm.

From the projected BC numbers I would say the BC will be on the upper end of the range you list but we will have to see.

Not sure when the bullets will be available either but I am pretty sure you two will be two of the first to get them in the air, just have a hunch on that one [img]/ubbthreads/images/graemlins/grin.gif[/img]!!

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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  #28  
Old 11-29-2005, 04:09 PM
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Re: 270WSM 169.5grn Wildcat range test

I cannot wait to test those bullets. For this kinda stuff I love being a guinie pig,( i am sure i spelled that wrong)

As for the Wc872 it is a great powder and is extremely cheap and easily available so I have few complaints on it. But it is temp sensitive.

before me and Bj's buffalo hunt we tested our drops on milk jugs out to 1000yds. Everyhting went fine until I tried to break a jug at 1k. The reading exbal told me was almost exactly 1 MOA off from what it had been a week before. The only difference was the first time we shot it was 55 degrees this time it was 25 or so.

A quick adjustment and 2 shots rendered 2 exploded milk jugs. Something about blowing something up at that range just makes you feel all warm and fuzzy inside [img]/ubbthreads/images/graemlins/grin.gif[/img]

Hopefully US869 will solve this problem, if not it really isnt a big deal as long as we do the practicing we should be doing anyway

I sent you a email Kirby

take it easy
steve
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