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Posted: 1/15/2006 12:11:48 PM EDT
Can i have some info on this round pleaseeeee
Link Posted: 1/15/2006 1:45:33 PM EDT
[Last Edit: 1/15/2006 1:46:05 PM EDT by JohanLondon]

Info about Grendel round...

Google is your friend ;)
Link Posted: 1/15/2006 3:01:49 PM EDT
hey Google I need to borrow a "Grand"

who's my friend?

Taffy
Link Posted: 1/15/2006 11:42:40 PM EDT
Check here and here
for some Grendal info.

Low Mill Ranges in Cumbria are UK suppliers for 6.5 Grendal and .50 Beowulf.

Cheers
Steven
Link Posted: 1/15/2006 11:52:03 PM EDT
If you really want to know about the Grendel, wait till Mousegunner comes along, it's him and his mate that are the importers/dealers for it

Mark
Link Posted: 1/16/2006 12:31:55 AM EDT

Originally Posted By Taffy223:
hey Google I need to borrow a "Grand"

who's my friend?

Taffy

Link Posted: 1/16/2006 1:18:11 PM EDT
Here's one I built earlier..




More to come once the US State Dept get the paper work sorted, though I wont be building them the same as the one in the pic (mine) as the costs would go through the roof.

Must say that so far the rifle/round works great, certainly beats the .223 especially when its windy, taking about half as much wind. So far I have only worked a load up for the 123 lapua cenar (sub 1 min at 200 yards) works well ot to 600 yards. I have tried it at 1000 yards with mixed results. I am only managing to get 2480 fps with a SD of 4, at the moment. Its a trade off, speed versus extraction, so can't load to the same loadings that the Yanks are using without having stiff extractions.

The best way to go for 1000 yards will probably be with the 108 lapua cenar, driving it faster than the 123 to ensure the round is consistantly supersonic at 1000. Thats for later in the year though.

The gun mags will be doing a review on the rifle within the next couple of months.

Dave


Link Posted: 1/16/2006 1:53:36 PM EDT

Originally Posted By Mousegunner-UK:
Here's one I built earlier..

tinypic.com/kd2887.jpg


More to come once the US State Dept get the paper work sorted, though I wont be building them the same as the one in the pic (mine) as the costs would go through the roof.

Must say that so far the rifle/round works great, certainly beats the .223 especially when its windy, taking about half as much wind. So far I have only worked a load up for the 123 lapua cenar (sub 1 min at 200 yards) works well ot to 600 yards. I have tried it at 1000 yards with mixed results. I am only managing to get 2480 fps with a SD of 4, at the moment. Its a trade off, speed versus extraction, so can't load to the same loadings that the Yanks are using without having stiff extractions.

The best way to go for 1000 yards will probably be with the 108 lapua cenar, driving it faster than the 123 to ensure the round is consistantly supersonic at 1000. Thats for later in the year though.

The gun mags will be doing a review on the rifle within the next couple of months.

Dave





That is one awesome looking rifle. Just out of curiosity, how much would a similar rifle like that cost to commision/build?
Link Posted: 1/16/2006 2:17:10 PM EDT
According to Infinity, you'll have to be driving the 108's at 2600fps to remain supersonic at 1000yds, but realistically you'll need a bit more speed than that to allow a certain margin for error.

Trajectory Variations for Lapua .264 dia., (6.5mm) 108 gr. Scenar at 2600 Feet per Second
At an Elevation Angle of: 0 degrees
Ballistic Coefficients of: 0.478 0.478 0.478 0.478 0.478
Velocity Boundaries (Feet per Second) of: 2480 2480 2480 2480
Wind Direction is: 3.00 o'clock and a Wind Velocity of: 10.0 Miles per hour
Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0
Altitude: 0 Feet with a Standard Atmospheric Model.
Temperature: 59 F
Range Velocity Energy Momentum Drop Bullet Path B.P. Diff Wind Drift
(Yards) (Ft/Sec) (Ft/Lbs) (Lb-Sec) (inches) (inches) (inches) (Inches)
0 2600.0 1620.8 1.25 0.0 -1.5 0.0 0.0
100 2418.0 1401.9 1.16 -2.7 0.0 0.0 0.75
200 2243.3 1206.7 1.08 -11.35 -4.46 0.0 3.11
300 2075.9 1033.2 1.00 -26.93 -15.83 0.0 7.27
400 1915.9 880.1 0.92 -50.59 -35.3 0.0 13.44
500 1764.0 746.1 0.85 -83.74 -64.25 0.0 21.86
600 1621.3 630.3 0.78 -128.09 -104.4 0.0 32.78
700 1489.1 531.6 0.71 -185.69 -157.81 0.0 46.47
800 1368.9 449.3 0.66 -259.01 -226.92 0.0 63.17
900 1262.7 382.3 0.61 -350.91 -314.63 0.0 83.07
1000 1172.8 329.8 0.56 -464.64 424.16 0.0 106.21
Link Posted: 1/16/2006 2:55:20 PM EDT
Marky,
any idea how that compares to, say an 80SMK through a 24" AR?


SteveA
Link Posted: 1/16/2006 3:05:09 PM EDT
It still beats an 80SMK, even when driven at 2800fps
Link Posted: 1/17/2006 12:17:52 PM EDT
Drool, nice looking shooter.

Whats the barrel length on that sucker ?

Mark - How come you don't have one yet ?

Mousegunner - Are you associated with the Cumbrian outfit or are you a splinter cell ?
Link Posted: 1/17/2006 1:20:59 PM EDT

Originally posted by Steven-UK

Mousegunner - Are you associated with the Cumbrian outfit or are you a splinter cell ?




I am the founder of the Cumbrian outfit


As well as being one of the first shooters in the UK to own a straight pull AR15 way back in 93 and 17 different AR's from .17 to 6.5mm through the time. (just checked back through the copies of my FAC)

The Grendel barrels a 19.5" unit with a 1:8 twist.

Dave
Link Posted: 1/17/2006 2:37:06 PM EDT

Originally Posted By steven_uk:


Whats the barrel length on that sucker ?

Mark - How come you don't have one yet ?



Couldn't be bothered.
Too many other projects
Maybe in the future.

I do have a 6BR though...........and the .300 Whisper will be along shortly.................very shortly

Actually I did consider the Grendel and nearly went for one but decided against it in the end.
I enjoy building the things as much as shooting them and as I couldn't get the required parts to build it myself (reamers, barrel extn's and bolts) I dropped the idea.
It does shoot though, but I've decided to keep my shooting simple. ie, .223 and 77 & 80 grainers.

One of it's drawbacks is in mag capacity. Although not a great hindrance, I thought it would be limited, and somewhat wasted, in PR.
For SR though, it's a winner, but not in Dave's hands

Now....even though it will shoot a 139gn Scenar with a BC of .615, because Davey-Man can only get 2500ish, it will not beat a .224 cal JLK 80gn VLD at 2900ish, which is what I can get from my rifles.
And that's it's drawback.
The JLK's are real specialty bullets though.

The 6BR would've been the best of everything, but it really is specialised and has feeding problems.
I did shoot 11 v-bulls in a row at 1000yds with it though, but for 1000yd comps I use a .260 Rem.
That is king

Mark
Link Posted: 1/17/2006 3:35:57 PM EDT

Originally Posted By streetfighter:

Now....even though it will shoot a 139gn Scenar with a BC of .615, because Davey-Man can only get 2500ish, it will not beat a .224 cal JLK 80gn VLD at 2900ish, which is what I can get from my rifles.

Mark



Pray tell,
what twist rate does this require?
barrel life?
Link Posted: 1/17/2006 9:57:59 PM EDT

Originally Posted By limey1:

Originally Posted By streetfighter:

Now....even though it will shoot a 139gn Scenar with a BC of .615, because Davey-Man can only get 2500ish, it will not beat a .224 cal JLK 80gn VLD at 2900ish, which is what I can get from my rifles.

Mark



Pray tell,
what twist rate does this require?
barrel life?



A 1/8 will do it but a 1/7 will be better.
Barrel life: Because you won't be firing them all the time, with a mixture of 77's etc, probable good life will be 6000rds max. For the really discerning, 4-5000rds.

Forgot to add, JLK's have a BC of .510 or so.
Also JLK are now out of production but they are still available.

Mark
Link Posted: 1/18/2006 6:31:50 AM EDT
[Last Edit: 1/18/2006 6:37:31 AM EDT by limey1]

Originally Posted By streetfighter:

Forgot to add, JLK's have a BC of .510 or so.
Also JLK are now out of production but they are still available.

Mark



Sierra advertise their 90SMK as having a BC of .511(1900-2200 fps) wonder if they are worth trying? shouldn't have any problem getting hold of Sierra's.

Now just wonder what bbl length we need for this?
24" spacegun, anybody?
Link Posted: 1/18/2006 8:31:07 AM EDT

Originally Posted By limey1:

Originally Posted By streetfighter:

Forgot to add, JLK's have a BC of .510 or so.
Also JLK are now out of production but they are still available.

Mark



Sierra advertise their 90SMK as having a BC of .511(1900-2200 fps) wonder if they are worth trying? shouldn't have any problem getting hold of Sierra's.

Now just wonder what bbl length we need for this?
24" spacegun, anybody?



You need a 6.5 twist for those
Link Posted: 1/21/2006 12:23:50 AM EDT

Originally posted by streetfighter.

One of it's drawbacks is in mag capacity. Although not a great hindrance, I thought it would be limited, and somewhat wasted, in PR.



Just got off the phone with Alexander Arms and they have informed me that the 16 round magazines have been dropped and that the will be supplying 24 rounders with the next batch of rifles we will be building for the UK market.

Davey Man
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