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#12525 - 05/16/17 02:41 PM Testing 147 ELD's & RL-16 in the AR-Creedmoor
Niles Coyote Online   content
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Registered: 07/09/11
Posts: 1377
Loc: S.W. Michigan
Trying out 147 eld's and RL-16 using a new OCW method. I've actually been doing this for the last two or so years but 6.5Guys have now committed it to video so I have second party verification that I am not the only one seeing results by approaching OCW testing this way.

Back yard velocity testing using freshly annealed Hornady brass with who knows how many firings, CCI standard primers bullets seated to 2.850".
I am using my full mass DPMS Carrier for this test, gas block setting unchanged for last years match load and I used the low mass carrier for that.
1 round fired:
40.0=2575
40.3=2597*
40.6=2609*
40.9=2632
41.2=2645
41.5=2660
41.8=2682*
42.1=2696* (very light ejector swipe on head stamp)
*=flat point in velocity

So with the above I see two nodes, the top one is to hot for this gas gun IMO... Why you ask? I don't want to be one of those guys proclaiming Hornady brass is trash cause I only get X number of loads before it wont hold primers wink

I retested the area of 40.3-40.6 but this time using Hornady factory fresh brass with the necks expanded using a sinclear mandrel and then run through a sizing die to provide a neck tension of -.003
Three shots for speed
40.4=2592, 2590, 2594 SD/2 ES/4
40.6=2604, 2600, 2602 SD/2 ES/4

All velocities were captured using a Gen1 magnetospeed.

I'll be loading up 40.4, 40.5, 40.6 and taking that to the range in the next few days for some groups at distance.

Links to 6.5 guys video's on the subject.

https://www.youtube.com/watch?v=O4K4l0KzRfg

https://www.youtube.com/watch?v=ACyfeeBHVOA

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#12526 - 05/18/17 07:19 AM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Cinch Offline
veteran

Registered: 07/09/11
Posts: 1261
Loc: Wyoming
Are you using the ELD X or M? I've always wanted to try this method but never took the time...

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#12527 - 05/18/17 04:24 PM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Niles Coyote Online   content
veteran

Registered: 07/09/11
Posts: 1377
Loc: S.W. Michigan
It's the M line, Hornady's new this year 147 grain .264 with a real nice b.c. of .697g1/.351g7 for the high band... Though it will be a bit below that at my velocity out of this AR...

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#12528 - 05/21/17 07:01 AM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Niles Coyote Online   content
veteran

Registered: 07/09/11
Posts: 1377
Loc: S.W. Michigan
Originally Posted By: Niles Coyote
It's the M line, Hornady's new this year 147 grain .264 with a real nice b.c. of .697g1/.351g7 for the high band... Though it will be a bit below that at my velocity out of this AR...


After compiling the numbers on JBM with the BC bands here
http://www.hornady.com/BC

I've come to the conclusion that I should probably stick with the 140's in the AR as the velocity/BC make the two close to call and the heavier bullet requires me to use the full mass carrier which adds more recoil (or higher chance of movement off target during cycling) to the AR.

BC average to 1k based off start velocity:
2600, 147=.330g7/.655g1
2690, 140=.316g7/.629g1

I'll save the 147's for the bolt gun.

I'll start testing RL-16 with 140's, Last year I used 41.3gr of H4350 and depending on the temps I was between 2670 & 2690. RL-16 seems to give a little boost when loaded to the same powder charge and is more temperature stable so I'll run my test from ~40.0-42.0

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#12529 - 05/22/17 01:48 PM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Niles Coyote Online   content
veteran

Registered: 07/09/11
Posts: 1377
Loc: S.W. Michigan
I had something weird happen when testing RL-16 with 140 ELD's all charges from 40.1-41.7 had ejector swipes... not sure what to think about this. Works fine with the heavier 147 but not 140's... velocity was all over the place too.

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#12530 - 05/22/17 03:33 PM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Cinch Offline
veteran

Registered: 07/09/11
Posts: 1261
Loc: Wyoming
That's really strange.

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#12558 - 09/04/17 12:14 PM Re: Testing 147 ELD's & RL-16 in the AR-Creedmoor [Re: Niles Coyote]
Niles Coyote Online   content
veteran

Registered: 07/09/11
Posts: 1377
Loc: S.W. Michigan
Bartein/Pierce 25" bolt action
147@ 3.240/-.030 off lands
RL-16
40.3= 2708 (1st shot cold barrel) 2670=?
40.5= 2678,2680= 2679 1/2
40.7= 2686,2688= 2687 1/2
40.9= 2708,2714= 2711 4/6

Going to test 40.3-40.7 at distance next.

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