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300 Allen Xpress Raptor throwing bullets, pics....

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Unread 12-05-2007, 05:20 PM
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300 Allen Xpress Raptor throwing bullets, pics....

To all,

After several late nights working after regular house, thank you to my wife by the way and some work this weekend, the first fully functional Raptor rifle from APS is throwing bullets!!!

First on the rifle componants:

APS Raptor receiver
20 moa rail base
Jewell trigger set at 1 lb
HS Precision DM system
Lilja 1-8, 6 groove 30 cal, 30" finish length #8 contour, heavy flutes
Defensive Edge muzzle brake
McMillan A-5 stock, adj CP, Decelerator pad 85% black, 15% grey
Stainless Steel pillar bedding
Burris 1/4" Xtreme Tactical rings
NF NXS 5.5-22x 50mm NP-R1

The Raptor is designed specifically for the Lapua class round and wildcats but also is long enough to allow rounds such as the big Wby and Rigby rounds to be used also. Its also right at home with the RUM class of rounds.

The barrel selection I chose was because I plan on using Richards aluminum tipped bullets in this rifle but for the time being I will be using 240 gr SMKs or 200 gr Accubonds. Here are some pics:

Like all first production prototype things, my receiver has some minor issues. All in all, its what I wanted but a few things will and have been modified for better function.

1. The cases were rubbing hard against the top of the ejection port which was milled straight down from the top of the receiver. I undercut this slightly on the mill to eliminate this case rubbing, worked perfectly. That will be changed in the production receivers to have this back cut.

2. The rail base will be extended to the end of the recevier to offer more room for long scopes and rail accesaries. It will also be made from Stainless Steel instead of the heat treated aluminum which the rail on this base is made from.

3. The bolt stop will be redsigned to a more attractive(my opinion0 design.

4. The rounds were binding a bit while feeding them so I shallowed the feed ramp angle a bit and repolished and not it works perfectly so this will be modified in the production receivers.

5. The receiver engraving will also be changed a bit to emphasize the Raptor name instead of Allen Precision Shooting.

These are pretty minor issues which were expected with such a project. The bedding had finally cured enough that I could start testing the rifle, or at least doing the brake in at the shop. It has either been very cold or very windy and today was no exception, very windy so no taget work yet. I just was checking for velocity potential with this barrel and how my receiver handled pressure.

I decided to start with the 240 gr SMK and US869. I started at 100.0 gr and worked up two grains at a time until I could just notice a slight increase in force needed to lift the bolt.

Here were the velocity results.

100.0 gr......................................2907 fps
102.0 gr......................................2963 fps
104.0 gr......................................3007 fps
106.0 gr......................................3062 fps
108.0 gr......................................3124 fps
110.0 gr......................................3208 fps Max working load
111.0 gr......................................3258 fps Snug bolt lift
112.0 gr......................................3311 fps bolt quite snug to open
113.0 gr......................................3368 fps heavy bolt life, ejector mark

Again, these were fired at the shop so no accuracy data yet.

Some may wonder why I went to 113.0 gr when 110.0 gr is my max working load, simply put, I wanted to see how well the Raptor worked with a higher then normal pressure load. IT handled extremely well.

I figured 110.0 gr would be a great top end load level. +3200 fps is most impressive. Interestingly enough, this same bullet iver Retumbo topped out at just shy of 3100 fps before pressuring out so it looks like 869 is a pretty good balance of burn rate for this case capacity. At 110 gr, this is roughly a 98 load density

After shooting each load, I would take the fired cases and line them up from mildest load to hottest. I then sized each case, cleaned and then reseated a primer to let the cases tell me what pressures we were running at.

I will be brutally honest, at 113.0 gr I will admit that primer pocket tightness was a bit less then all others but in all, everycases primer pocket remained very tight and completely usable and there was no chance in primer tighteness from the 100.0 gr load up to the 112.0 gr load. Trestimate to the stoutness of the Lapua case.

Again, no groups yet but soon, if the weather allows. Wanted toget this rifle done so I could get the changes on the receiver going ASAP. Stay tuned, there will be much much more to come on this receiver.

Kirby Allen(50)
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

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Unread 12-05-2007, 05:30 PM
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Join Date: Aug 2007
Location: Bull Mtns MT
Posts: 593
As always, very nice Kirby
I'd Rather Make a Slow Hit Than a Fast Miss!

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Unread 12-05-2007, 06:23 PM
Join Date: Nov 2004
Location: El Reno, OK
Posts: 1,497
Lookin good Kirby, sounds like you got a winner. ready to see what she will do when you really get to pushin her!!!
Steve Elmenhorst
Third Generation Shooting Supply
"Products for shooters, by shooters"
monday-friday 8:30-5:30 CST
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Unread 12-05-2007, 07:07 PM
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Join Date: Sep 2005
Posts: 748
Nice Stick

Hi Kirby you must be proud of your new actions the finished product looks awsome good luck with the changes.

You might have time to play with the 510AX

Cheers Bill
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Unread 12-05-2007, 07:30 PM
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Join Date: Jun 2005
Location: Yakima, Washington
Posts: 3,775

That's a familiar looking rifle. I'd say you've got another winner.;)

Even though you've got a few minor things to get ironed out, I'd say you had the Raptor pretty well planned out and it shows.

Sounds like it won't have any problems handling just about anything you chamber it for.

Keep us posted and get some pics of the new receiver when you get the mods made.
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Unread 12-05-2007, 09:01 PM
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Join Date: Nov 2003
Location: Washington State
Posts: 2,726
Wow. Want to hear more about the Raptor. Keep us posted. Thanks.

In the beginning God created the heavens and the earth. Genesis 1:1

"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God?" Thomas Jefferson - Notes on the State of Virginia

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Unread 12-05-2007, 11:29 PM
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Talked to my manufacturer tonight. I had sent him all the info on the corrections I want on the receiver. He said he has already made the modifications and that a new receiver with the updates would be on the way ASAP for testing.

We are getting very close to taking customer orders. As soon as that next prototype gets here and proven and if everything meets my requirements, we are rolling!!!

Kirby Allen(50)
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

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