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Max Online: 16728 @ 03/25/12 08:51 AM
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#7106931 - 03/10/18 09:06 AM Finding the node
TackDriver Offline
Tracker

Registered: 05/02/14
Posts: 840
Headed off to the range with the .308 and forgot the damn chronograph, so did a 3 round group test with the MR-2000 and 185 Juggernauts in the .308 I never used MR-2000 and wanted to give it a try. Charges are in .3 increments as in order from left to right, 45.1, 45.4, 45.7, 46.0, 46.3, 46.6, 43.9, and 47.2 grains. Little wind from left to right at 5 to 8 mph and test is @ 100 yards. Should have done 200 but wind was acting a little weird. Velocity is unknown, but sure gives a sharper recoil than the 168 / 175's.
Opinions on a node? I was choosing # 3, 4 and 5 and try again @ 200 or 300. What say you?


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#7106938 - 03/10/18 09:13 AM Re: Finding the node [Re: TackDriver]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7971
Loc: Wise Co.
I like 5, but I think you should shoot all three charges again.
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#7106947 - 03/10/18 09:23 AM Re: Finding the node [Re: TackDriver]
Cleric Offline
Veteran Tracker

Registered: 03/11/12
Posts: 3209
3 and 4 are a bit worrisome because itís a lot of vertical dispersion

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#7106968 - 03/10/18 09:38 AM Re: Finding the node [Re: TackDriver]
Buzzsaw Online   content
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Registered: 06/29/11
Posts: 12671
Loc: Frisco, Texas
Its ok, I always forget something when I go to the range. Always carry 2 new 9volt for my chrono.
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#7106976 - 03/10/18 09:46 AM Re: Finding the node [Re: Cleric]
TackDriver Offline
Tracker

Registered: 05/02/14
Posts: 840
Originally Posted By: Cleric
3 and 4 are a bit worrisome because itís a lot of vertical dispersion


I agree, won't hurt to try those 3 @ 300, but leaning on #5 but if it warms up in the summer, i may be out of the node. frown

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#7106985 - 03/10/18 09:49 AM Re: Finding the node [Re: RiverRider]
TackDriver Offline
Tracker

Registered: 05/02/14
Posts: 840
I'll rifle them again. I agree with you RR.


Edited by TackDriver (03/10/18 10:46 AM)

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#7107012 - 03/10/18 10:23 AM Re: Finding the node [Re: TackDriver]
Jgraider Online   content
Tracker

Registered: 06/13/15
Posts: 936
Loc: West Texas
Nice shooting TD. What's interesting to me is I would think more powder would equal more velocity, which would equal groups having higher POI instead of lower.

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#7107024 - 03/10/18 10:37 AM Re: Finding the node [Re: Jgraider]
wp75169 Online   content
Extreme Tracker

Registered: 10/11/09
Posts: 4243
Loc: Wills Point
Originally Posted By: Jgraider
Nice shooting TD. What's interesting to me is I would think more powder would equal more velocity, which would equal groups having higher POI instead of lower.


I saw that as well and was curious.

Any chance you pulled on 6? Iím more curious about 6 than 3-4.

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#7107029 - 03/10/18 10:41 AM Re: Finding the node [Re: Jgraider]
TackDriver Offline
Tracker

Registered: 05/02/14
Posts: 840
Originally Posted By: Jgraider
Nice shooting TD. What's interesting to me is I would think more powder would equal more velocity, which would equal groups having higher POI instead of lower.


That was weird to me as well, no idea why it went lower.

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#7107033 - 03/10/18 10:44 AM Re: Finding the node [Re: TackDriver]
Big Fitz Offline
Veteran Tracker

Registered: 12/06/09
Posts: 2411
Loc: Prosper, TX
Have you considered smaller increments in charge now that you have it narrowed down? Something like 46.0, 46.1, 46.2 and 46.3?
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#7107035 - 03/10/18 10:45 AM Re: Finding the node [Re: wp75169]
TackDriver Offline
Tracker

Registered: 05/02/14
Posts: 840
Originally Posted By: wp75169
Originally Posted By: Jgraider
Nice shooting TD. What's interesting to me is I would think more powder would equal more velocity, which would equal groups having higher POI instead of lower.


I saw that as well and was curious.

Any chance you pulled on 6? Iím more curious about 6 than 3-4.


Not so sure, I was careful with each shot, but won't hurt to try again with 3 to 6.

BigFitz, I will on the next time out to .2


Edited by TackDriver (03/10/18 10:47 AM)

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#7107049 - 03/10/18 11:03 AM Re: Finding the node [Re: TackDriver]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 22899
Loc: Texas
Originally Posted By: TackDriver
Originally Posted By: wp75169
Originally Posted By: Jgraider
Nice shooting TD. What's interesting to me is I would think more powder would equal more velocity, which would equal groups having higher POI instead of lower.


I saw that as well and was curious.

Any chance you pulled on 6? I’m more curious about 6 than 3-4.


Not so sure, I was careful with each shot, but won't hurt to try again with 3 to 6.

BigFitz, I will on the next time out to .2


Would try 3-6 with the .2 increments at 200 or 300 if available
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#7107069 - 03/10/18 11:38 AM Re: Finding the node [Re: TackDriver]
jeffbird Online   content


Registered: 03/09/09
Posts: 2917
Run the test at least at 200 or 300 yards and the answer will become more obvious.

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#7107765 - 03/11/18 08:52 AM Re: Finding the node [Re: TackDriver]
Smokey Bear Offline
Tracker

Registered: 05/11/17
Posts: 589
Loc: Texas
Nice shooting TD. Poi is trending downward but flattens out at five and still has very little dispersion through six. The center of those two groups appear to be the same point. I would probably start .1gr below group five and go to .1gr above group six. Looks like its shootin' pretty good right in there.
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#7111715 - 03/15/18 01:12 AM Re: Finding the node [Re: TackDriver]
Wildphilhickup Offline


Registered: 02/26/09
Posts: 2283
Loc: ALLEN, TEXAS
You all have a laboratory precision scale; +\- 1mg ?

I have never found a scale that was any better than +\- 0.2 grains.

Gage R&R.
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