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Mar 25th, 2012
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Finding the node #7106931
03/10/18 03:06 PM
03/10/18 03:06 PM
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TackDriver Online content OP
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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?


Re: Finding the node [Re: TackDriver] #7106938
03/10/18 03:13 PM
03/10/18 03:13 PM
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Wise Co.
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I like 5, but I think you should shoot all three charges again.




I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura. Intellectual honesty is not for fragile egos.
Re: Finding the node [Re: TackDriver] #7106947
03/10/18 03:23 PM
03/10/18 03:23 PM
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3 and 4 are a bit worrisome because itís a lot of vertical dispersion

Re: Finding the node [Re: TackDriver] #7106968
03/10/18 03:38 PM
03/10/18 03:38 PM
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Frisco, Texas
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Its ok, I always forget something when I go to the range. Always carry 2 new 9volt for my chrono.


"I ain't here for a long time, I'm here for a good time"
King George Strait


Re: Finding the node [Re: Cleric] #7106976
03/10/18 03:46 PM
03/10/18 03:46 PM
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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

Re: Finding the node [Re: RiverRider] #7106985
03/10/18 03:49 PM
03/10/18 03:49 PM
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I'll rifle them again. I agree with you RR.

Last edited by TackDriver; 03/10/18 04:46 PM.
Re: Finding the node [Re: TackDriver] #7107012
03/10/18 04:23 PM
03/10/18 04:23 PM
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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.

Re: Finding the node [Re: Jgraider] #7107024
03/10/18 04:37 PM
03/10/18 04:37 PM
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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.

Re: Finding the node [Re: Jgraider] #7107029
03/10/18 04:41 PM
03/10/18 04:41 PM
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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.

Re: Finding the node [Re: TackDriver] #7107033
03/10/18 04:44 PM
03/10/18 04:44 PM
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Prosper, TX
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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?


Originally Posted By: syncerus
I prefer to think of myself as a control enthusiast. wink
Re: Finding the node [Re: wp75169] #7107035
03/10/18 04:45 PM
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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

Last edited by TackDriver; 03/10/18 04:47 PM.
Re: Finding the node [Re: TackDriver] #7107049
03/10/18 05:03 PM
03/10/18 05:03 PM
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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

Re: Finding the node [Re: TackDriver] #7107069
03/10/18 05:38 PM
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Run the test at least at 200 or 300 yards and the answer will become more obvious.


Professionally trained and certified pistol and license to carry instructor.
Re: Finding the node [Re: TackDriver] #7107765
03/11/18 01:52 PM
03/11/18 01:52 PM
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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.


Smokey Bear---Lone Star State.
Re: Finding the node [Re: TackDriver] #7111715
03/15/18 06:12 AM
03/15/18 06:12 AM
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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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Re: Finding the node [Re: TackDriver] #7114899
03/18/18 04:24 AM
03/18/18 04:24 AM
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Group 4 looks like 3 in the same hole and one "flyer" if you want to call it that. Group 5 and 6 both look good. I'd group shoot those loads at 300 and see which one looks best. If they all still look good and ES/SD seem fine, I'd pick the middle one so hotter temps didn't hurt me.

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