Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Lightweight 7mm Allen Magnum pics....

 
LinkBack Thread Tools Display Modes
  #8  
Old 08-13-2006, 10:28 PM
TMR TMR is offline
SPONSOR
 
Join Date: Mar 2006
Location: Elma, WA
Posts: 497
Re: Lightweight 7mm Allen Magnum pics....

Definitely the ulimate packing rifle.....another fine job Kirby.

Looks like I might have to have another one built, and I still have a few months to wait on the one you are building now. Maybe a guy should have a lightweight and a med-hvy weight? Looking foward to seeing the test data...
__________________
Travis Redell
R Bros Rifles
www.rbrosrifles.com
Reply With Quote
  #9  
Old 08-13-2006, 11:04 PM
Platinum Member
 
Join Date: Jul 2005
Posts: 1,651
Re: Lightweight 7mm Allen Magnum pics....

Fifty, the rifle looks great. Let us know how she KICKS. Is that your brake on the rifle.
Reply With Quote
  #10  
Old 08-14-2006, 07:05 AM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,793
Re: Lightweight 7mm Allen Magnum pics....

Wildcat,

No that brake is one of Shawn Carlocks. I really like the look of this brake. Very small in diameter but has alot of surface area in the partitions because of the round port designs. I also believe the round ports will give the brake a more "directional" effect on the recoil meaning it will act more directly against the recoil because it will be concentarated in a more definate vector against the line of recoil.

I think it will work very well. The lighter the rifle, the larger the case capacity and the smaller the bore, the better the brakes work. I would not be suprised to have the sensation that the rifle is being pulled away from me when I fire it.

Wishful thinking maybe but in a rifle this light it is not uncommon to feel this.

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

allenmagnum@gmail.com
Reply With Quote
  #11  
Old 08-14-2006, 07:50 AM
SPONSOR
 
Join Date: Nov 2004
Location: El Reno, OK
Posts: 1,503
Re: Lightweight 7mm Allen Magnum pics....

Good looking rig Kirby

I am ready to hear what you think about the bbl when you get her going. Just a nice, clean looking setup that is ready to do some damage.

take it easy
steve
__________________
Steve Elmenhorst
Third Generation Shooting Supply
www.3rdgss.com
"Products for shooters, by shooters"
1-800-522-3314
monday-friday 8:30-5:30 CST
Reply With Quote
  #12  
Old 08-14-2006, 08:42 AM
SPONSOR
 
Join Date: Dec 2004
Location: El Reno, OK
Posts: 1,930
Re: Lightweight 7mm Allen Magnum pics....

You've got to stop turning out rifles and posting these pics!! Makes me want to build something else!!! Good looking rig. Will be curious to see how she shoots w/the heavey bullets and that pencil bbl.
Reply With Quote
  #13  
Old 08-18-2006, 12:20 PM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,793
Re: Lightweight 7mm Allen Magnum pics....

Got out early this morning for the first range test of my lightweight 7mm AM looking for velocity testing and stability testing.

This is the first time I have personally used a 1-9 twist 6 groove Lilja barrel with my 7mm AM and the 200 gr ULD RBBT. Combine that with the very light #3 contour 27" barrel and I was very curious what to expect.

First test went pretty good. Conditions were 65 degrees with 90% humidity!!! It was sticky out there this morning, alot of rain yesterday.

My load consistated of formed Norma cases(had 100 new cases to use up. Very good quality but MUCH softer then Lapua hulls), Hodgdons new US869 powder, Fed 215 primers and the Wildcat 200 gr ULD RBBT seated to an over all length of 3.625".

Just for reference, in this rifle, an OAL of 3.660" will just touch the lands. We are finding that jamming these long bullets into the lands may be causing some bullet integrity issues so I am testing OAL to see what happens.

Basically I am jumping them 35 thou to the lands.

Here are the velocity results:

95.0...................2899 fps
96.0...................2952 fps
97.0...................2987 fps
98.0...................3026 fps
99.0...................3044 fps
100.0..................3066 fps
101.0..................3097 fps
102.0..................3143 fps
103.0..................3170 fps
104.0..................3202 fps

The rifle grouped at right at 1/2" ctc with the first two shots of each group. This is not uncommon with a barrel of this small contour with a very long bullet and a very large case capacity. I learned long ago that testing this type of rifle, that two shots are about all you will get with a true idea of what the rifle will do accuracy wise. Let her cool and then shoot another two and they will print tight as well.

Looking at the fired cases, only loads 103 and 104 had any real sign of an ejector mark on the case head. And only the 104 gr load had any change in bolt lift. All loads ejected like they were not even there.

When I got back to the bench, I was not suprised with what I found. The 104.0 gr load had slightly loosened the primer pocket. It is still a very usible case but it did loosen the pockets grip on the primer so I consider the 103 and 104 gr loads to hot for this rifle combo and consider 102.0 gr as the max working load for this rifle in these conditions.

That said, next test will be long range stability so I am going to reload these cases with 101.0 gr which should average right at 3100 fps in this rifle and test them at 800 yards to see how they perform to give a true understanding of how the 1-9 twist is spinning these big bullets.

Just for comparision, in the rifle I used last fall hunting in Canada, 103 gr WC872 produced 3175 fps with the same bullet but in a 30" barrel. My new rifle with this new load will easily get within 25 fps of this load with 3" less barrel length and 4 lbs less rifle.

As to the recoil of this rifle fitted with one of Shawn Carlocks small diameter brakes, it is not all warm and fuzzy but I would class the full tilt loads in the same class as a 270 Win load at the most in a 7 lb rifle. You know it goes off but its easy to handle and shoot accurately.

I did take the brake off for the 104 gr load and recoil was noticably more then a factory sporter weight 300 RUM loaded with a 180 gr pill to 3350 fps. It wakes you right up, put the brake right back on after that!!! [img]/ubbthreads/images/graemlins/grin.gif[/img]

I am very impressed with this brake design that Shawn has come up with. For its small diameter, it does a VERY good job controlling recoil especially on a rifle of this weight and this size of chambering.

All in all, first test was a success, now onto serious testing, 800 yards. This will tell the story!!!

More to come soon, I hope to get out early in the morning for this test.

Good Shooting!!

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

allenmagnum@gmail.com
Reply With Quote
  #14  
Old 08-18-2006, 03:48 PM
Gold Member
 
Join Date: Feb 2005
Location: Texas born and raised
Posts: 746
Re: Lightweight 7mm Allen Magnum pics....

" Conditions were 65 degrees with 90% humidity!!! "

Man the rifle looks great and sounds like it shoots up to par so far. As for the conditions, I wished it was like that around here.

For most of my development, the 65% would have been like sudo desert, and the 65 degrees, well we might see that sometime mid to late Oct.

Last trip to the country to shoot drops, it was 78 degrees at 7:00 am with 100% humidity, then it warnmed up to about 98.
__________________
Later,
Mike / Tx

My Photo's

"Heck why would I lie, most folks don't believe the truth when I tell them"
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Lightweight 7mm Allen Magnum pics....
Thread Thread Starter Forum Replies Last Post
ALLEN PRECISION 510 Allen Magnum for sale Fiftydriver Guns For Sale 4 01-05-2012 10:35 PM
Original Allen Precision 375 Allen Magnum XHS for sale.... Fiftydriver Guns For Sale 10 02-02-2010 01:55 AM
More practice with the lightweight 7mm Allen Mag.. Fiftydriver Rifles, Bullets, Barrels and Ballistics 13 01-13-2010 07:39 AM
Promised pics of the 510 Allen Magnum... Fiftydriver Rifles, Bullets, Barrels and Ballistics 23 02-28-2008 04:19 PM
375 Allen Magnum first long range accuracy test, 510 Allen Magnum gets to play too... Fiftydriver Rifles, Bullets, Barrels and Ballistics 9 02-20-2008 08:42 PM

Current Poll
Do You Think Slingshots Should Be Legalized For Hunting Brown Bear?
Yes - 47.06%
889 Votes
No - 52.94%
1,000 Vote
Total Votes: 1,889
You may not vote on this poll.

All times are GMT -5. The time now is 07:35 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC