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Updated on January 8, 2017
jmdesignz2
Participant
January 8, 2017 at 5:05 am
Q:

Is 15 mils Adjustment enough for Vulcan .25 at 100 yards?

Hi – hope someone can chime in quick – need to figure this out before End of day Sunday 1/8

Is 15 mils Adjustment enough for Vulcan .25 at 100 yards?

Thanks
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Airgun Technology

All Replies

Viewing 6 replies - 1 through 6 (of 6 total)

hsnmz
Participant
January 10, 2017 at 2:54 pm
quote jmdesignz2:

quote hsnmz:

15 mils should be good enough for 200 yards

What velocity are you getting from Jsb.25 25.39gr from your Vulcan?

I am getting 912 fps. Getting .3″ to .45″ groups at 50 yards

mikewh
Participant
January 10, 2017 at 12:56 pm

Hi

Using JSB 25 grain pellets.
Fill pressure around 220 bar
Appx 5 mags
FPS around 905
Seems about optimum for me.
Good ES and SD.
Easy 40 mm chalk circular targets 100 metres
25 mm somewhat harder.
Hope that helps

Safe shooting

jmdesignz2
Participant
January 10, 2017 at 4:30 am
quote hsnmz:

15 mils should be good enough for 200 yards

What velocity are you getting from Jsb.25 25.39gr from your Vulcan?

hsnmz
Participant
January 9, 2017 at 2:05 pm

15 mils should be good enough for 200 yards

jmdesignz2
Participant
January 8, 2017 at 10:44 pm

I owe you another beer ! 🙂

Thanks

Looks like 15 mils total adjustment is more than enough

guykuo
Participant
January 8, 2017 at 1:09 pm

I don’t have a 25, but I can tell you what Chairgun predicts with JSB Kings 25 grain, a scope mounted 2.85 inches above barrel. Also assume 920 FPS velocity. 25’s can go higher FPS than that, but let’s be a little conservative for the calculations.

Assume 1 inch diameter target zone — Chairgun says optimum zeroes at 23 & 50 yards. We’ll use that.

For a target at 100 yards, the holdover is 3.4 MilDots or 11.6 MOA.

Is that what you were trying to find out?

Viewing 6 replies - 1 through 6 (of 6 total)

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