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 Chronographing Black MZ

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FrontierGander
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PostSubject: Chronographing Black MZ   August 13th 2013, 1:16 pm

Got out of the range long enough to test my 110gr Black MZ load with harvester EZ Load sabots and 300gr Harvester Scorpion PT Gold.

Chrony was set up at 15 feet.

Cold clean bore & swabbed between shots
1842
1881
1823
1741 " Hardly any felt recoil!"
1812

Cleaning the gun and setting it in the shade for a half an hour, I went back to the house and grabbed Three 260gr PT golds and using the same charge and swabbing between shots.
1899
1968

Never fired a 3rd shot due to the rain moving in.

So far, velocity is all over the board. My accuracy still held great, but at longer ranges, that wide of spread in velocity will just make it impossible to dial in accurately.
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Spitfire



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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 1:46 pm

Jon you might want to experiment with the amount of pressure you use to crush the powder
 , that might help to get the velocities more even.
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Marty
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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 3:05 pm

scratch
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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 5:00 pm

That's exactly what I do. This powder I compressed today as much as 3/8" of an inch.
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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 6:26 pm

I had the same thing when I tried it. Deviation was way too high to count on any long range consistency. I sure wish they would have been able to make what they originally intended too, but stupidity won out.

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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 7:15 pm

To have uniform velocity. You need uniform granules.

That kitty litter doesn't qualify.

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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 7:58 pm

Are you sure it is the powder and not the sabots throwing off your reading? I watched a video of Russell Lynch and he said he had to move the chronograph out to 60 feet so he could get good readings because the sabots were throwing off the results. It may be worth trying and see if that settles things down.

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PostSubject: Re: Chronographing Black MZ   August 13th 2013, 8:22 pm

yes ive tried that as well, the sabots get in the way if i have the sun shades on. No issues once they are off.
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PostSubject: Re: Chronographing Black MZ   August 14th 2013, 8:19 am

Have you tried not crushing the powder at all , just seating the bullet till it touches the powder ?
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PostSubject: Re: Chronographing Black MZ   August 14th 2013, 12:04 pm

yeah, thats worse with this brand of powder. It liked to be compressed, otherwise you can see a huge difference in velocity from shot to shot.
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PostSubject: Re: Chronographing Black MZ   August 14th 2013, 12:43 pm

With Wano I use a 1/8" wad that I use to compress my powder rather firmly with , then when I seat my bullet I push it down till it's just on top of the wad .

That way I get smallest deviation and best accuracy.
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PostSubject: Re: Chronographing Black MZ   August 14th 2013, 3:27 pm

Since the wads slow down considerably the instant their pedals spread out you would think that it would be a problem, two projectiles going though the traps at different speeds.

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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 6:17 am

Muley wrote:
To have uniform velocity. You need uniform granules.

That kitty litter doesn't qualify.
 "Kitty litter", sounds like American Pioneer.  Never chronographed it, but only way I ever got APP to group on target was be to seat the bullet with a sledgehammer. Laughing

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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 9:03 am

Yeah I've seen a guy on 'you tube' once that used a mallet to get his bullet started and to knock it down the barrel Smile
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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 9:06 am

@Spitfire wrote:
Yeah I've seen a guy on 'you tube' once that used a mallet to get his bullet started and to knock it down the barrel Smile
 Target shooters do that. They want a very tight fit for accuracy.

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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 10:51 am

Yikes Pete , not that tight that you have to use a hammer !

We have brass range rods that we force a tight fitting bullet down the tube and that seems to do ok .
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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 11:05 am

The videos i've seen were pounded in with a wooden mallet.

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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 11:48 am

That's a bit extreme for my liking , but then again i'm not a real target shooter .

What is a good group to me might be a crappy group to them Smile
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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 12:25 pm

Probably. They were shooting at 1000yds.

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PostSubject: Re: Chronographing Black MZ   August 15th 2013, 12:45 pm

I know a few 1000 yd shooters and most of them use paper patched .451" bullets.
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PostSubject: Re: Chronographing Black MZ   August 16th 2013, 4:05 pm

I'm curious did you weigh your charges or were they just volume ?
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PostSubject: Re: Chronographing Black MZ   July 7th 2014, 3:11 pm

Volume
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PostSubject: Re: Chronographing Black MZ   July 8th 2014, 7:50 am

Nothing like a quick response.  Suspect

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PostSubject: Re: Chronographing Black MZ   July 8th 2014, 10:46 am

Bob please hold for next available FG, estimated wait time is 11 months. We value your business so please stay on the line.

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PostSubject: Re: Chronographing Black MZ   July 8th 2014, 10:55 am

nearly a year ......not to bad  Laughing
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