Need some help with a chart for my Groundhog gun. - The HuntingPA.com Outdoor Community
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post #1 of 13 (permalink) Old 05-19-2016, 11:39 AM Thread Starter
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Need some help with a chart for my Groundhog gun.

Was hoping someone could help with a source for a ballistic chart for my groundhog set up....I had one tucked into the shell holder on the stock and of course it wound up in the black hole that hunting gloves and socks disappear to never to be seen again

It's a shooter as you can see below....
Savage 10FP , 20" bull .223 topped with a Weaver Grand Slam 6-20 X 40 Target dot with 1/8" MOA adjustments.

I'm shooting factory Hornady 55gr V-max which it loves. Factory data shows 3240 out of a 24" test barrel....my actual is probably a bit under.
(Sorry don't have a chrony)

Can anyone help me out with a chart with clicks out to say 350yds for a realistic interval in yardage.....every 10...every 25 or so?
Or point me in the right direction. Forgive me this stuff isn't my strongest area.

It's sighted in now dead on at 100yds.

The first picture shows one of the better 5 shot groups and before I brought it down a touch



This is pretty much how it will shoot all day long....not too shabby for factory ammo I guess?

FATTY!
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post #2 of 13 (permalink) Old 05-19-2016, 12:39 PM
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Re: Need some help with a chart for my Groundhog gun.

Well unless your intrigued by dialing scopes, for what your doing id be zeroing the gun at say 250 yds then just hold high or low for the shots. Take a trip to a prairie dog town with
your 223 and you will soon convert to being a
holdover shooter.
That said, the choice is yours and you can just
take a stab at the velocity by consulting a loading manual. Then go to a website like jb or lots of others and create a chart for your gun.
Confirm it by actuall shooting and tweak it as
necessary.
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post #3 of 13 (permalink) Old 05-19-2016, 02:54 PM Thread Starter
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Re: Need some help with a chart for my Groundhog gun.

Yeah for 300ydish max shots a 200yd zero probably would be smart with holdover or under.....if I had a 200yd range available to zero.

Guessing at 3200 out of the 20" barrel I'm trying to hold over 6.4" at 250yds with the 100yd zero. That's sketchy on a flat hog.

I had a great tape and was dialing em in out to 350 no problem because the shooting is never hot and heavy....wish I could find it.
The fatty in the pic above was dialed at 310 on that 100yd zero.

The 1/8" adj scope makes for a lot of clicks though!
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post #4 of 13 (permalink) Old 05-19-2016, 03:13 PM
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Re: Need some help with a chart for my Groundhog gun.

27-30 clicks for 1/8's should put you right about dead on
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post #5 of 13 (permalink) Old 05-19-2016, 03:45 PM
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Re: Need some help with a chart for my Groundhog gun.

1 1/4" high at 100 will put you dead on about 250 and 3" low at 300. It's almost a hold on fur zero. Inside 100 hold low, 100-300 hold dead on, 300-350 hold 3" high. I sight in ALL my groundhog rifles this way, from 17AH to 243 (and there's a lot in the middle). Keep it simple works for me. I don't worry about charts until I get past 350.
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post #6 of 13 (permalink) Old 05-19-2016, 03:54 PM
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Re: Need some help with a chart for my Groundhog gun.

There are a few online ballistic calculators. This is one I use because of its simplicity.
Just put your data in.

http://www.handloads.com/calc/index.html


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post #7 of 13 (permalink) Old 05-19-2016, 05:37 PM
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Re: Need some help with a chart for my Groundhog gun.

Quote:
Originally Posted by Matt / PA
Yeah for 300ydish max shots a 200yd zero probably would be smart with holdover or under.....if I had a 200yd range available to zero.

Guessing at 3200 out of the 20" barrel I'm trying to hold over 6.4" at 250yds with the 100yd zero. That's sketchy on a flat hog.

I had a great tape and was dialing em in out to 350 no problem because the shooting is never hot and heavy....wish I could find it.
The fatty in the pic above was dialed at 310 on that 100yd zero.

The 1/8" adj scope makes for a lot of clicks though!
A minit is a minit regardless of the click value of the scope. Get used to thinking minits
as opposed to counting clicks. The numbers on
the dial as a rule refer to minits if the scope is in minits. So putting the dial on #4 should be 32 clicks with your scope. Check it out.
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post #8 of 13 (permalink) Old 05-19-2016, 05:59 PM Thread Starter
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Re: Need some help with a chart for my Groundhog gun.

Quote:
Originally Posted by yobuck 1
Quote:
Originally Posted by Matt / PA
Yeah for 300ydish max shots a 200yd zero probably would be smart with holdover or under.....if I had a 200yd range available to zero.

Guessing at 3200 out of the 20" barrel I'm trying to hold over 6.4" at 250yds with the 100yd zero. That's sketchy on a flat hog.

I had a great tape and was dialing em in out to 350 no problem because the shooting is never hot and heavy....wish I could find it.
The fatty in the pic above was dialed at 310 on that 100yd zero.

The 1/8" adj scope makes for a lot of clicks though!
A minit is a minit regardless of the click value of the scope. Get used to thinking minits
as opposed to counting clicks. The numbers on
the dial as a rule refer to minits if the scope is in minits. So putting the dial on #4 should be 32 clicks with your scope. Check it out.
That's an awesome point and I didn't think of it that way......thanks for the tip!
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post #9 of 13 (permalink) Old 05-20-2016, 11:13 AM
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Re: Need some help with a chart for my Groundhog gun.

Adjustments in M.O.A "minits"
Try this. Should be close. If you can let me know the results, I can make a little speed adjustment to fine tune a little. Shooting prone with 223 you should be seeing your bullet impacts through the scope.

yds / moa

100 / 0
125/ 0.2
150 / 0.5
175 / 1.0
200/ 1.55
210 / 1.55
220 / 1.9
240 / 2.4
260 / 2.9
280 / 3.5
300 / 4.1
310 / 4.4
320 / 4.7
330 / 5.0
340 / 5.4
350 / 5.7
360 / 5.9
370 / 6.4
380 / 6.8
390 / 7.2
400 / 7.6

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post #10 of 13 (permalink) Old 05-20-2016, 07:41 PM
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Re: Need some help with a chart for my Groundhog gun.

It might be a bit hard to grasp at first but reading in MOA is really quite simple. Look at it like a tape measure. Once you get onto it you'll never look at it in click adjustments again. Who wants to count 209 clicks to get a 1000 yard adjustment, dial 26 1/8 MOA, done. It's just that simple for all distances
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