22lr bullet drop on mildot reticle

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22lr bullet drop on mildot reticle

Post by disco stu » 11 Oct 2021, 2:59 pm

Hey. Just wanting some opinions on this as I'm not sure it's right.

So this is me playing around with 22lr bullet drop on a mildot reticle on the Bushnell app, just trying to get my head around aiming points etc at longer range. I've got different brand mildot scope on the rifle currently, but the beauty of mildot is that one mil is one mil, or so I'm hoping. Distances are in meters, and zero is 50m

Screenshot_20211011-154754.png
Screenshot_20211011-154754.png (212.83 KiB) Viewed 759 times


I'm making assumptions about velocity and bullet weight, but they should be close to what ever I end up using in this rifle. Specs are in the top left.

Anyway, does this look around about right? I thought it would be dropping faster than it shows in this. Not looking for exact figures or anything, just trying to get my head around things

Thanks in advance

Stu
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Re: 22lr bullet drop on mildot reticle

Post by bladeracer » 11 Oct 2021, 3:33 pm

Using your figures I get similar numbers - 81m, 105m, 127m, 147m, 167m.
Shoot groups at 50m, 100m, 150m and 200m, measure the trajectory, then calculate backwards to determine an accurate BC, assuming you have measured the muzzle velocity.

Beyond 300m, groups open up enough to make bullet drop measurement less than precise, but I believe my BC is reducing slightly past that distance. A 10mph wind speed from behind or ahead is enough to add or subtract about 80mm on the height of the bullet impact at 300m.

With CCI Standard Velocity in my 18" RPR I'm using this. Basically, from a 100m zero, bullet drop is 400mm (16") at 150m, 1200mm (4-feet) at 200m, 2400mm (8-feet) at 250m, 3900mm (13-feet) at 300m, 6000mm (20-feet) at 350m, 8300mm (27-feet) at 400m, 11300mm (37-feet) at 450m, 15200mm (50-feet) at 500m.
With my RPR .22LR with CCI SV I'm using this, but I'm zeroed at 100m, and I'm using minutes:
17.5m zero 10mph wind 1.1MoA
25m 31mm 4.25MoA high 10mph wind 1.3MoA
50m 90mm 6.25MoA high 10mph wind 2.0MoA
75m 80mm 3.75MoA high 10mph wind 3.0MoA
100m zero 10mph wind 3.75MoA (200yd dot in the 223BDC is at 110m)
125m 160mm 4.5MoA low 10mph wind 4.5MoA (300yd dot)
150m 395mm 9.0MoA low 10mph wind 5.25MoA (400yd dot is at 143m)
175m 710mm 14.0MoA low 10mph wind 6.0MoA (500yd dot is at 162m)
200m 1130mm 19.5MoA low 10mph wind 6.75MoA (top of the duplex post is at 182m)
225m 1630mm 25.0MoA low 10mph wind 7.5MoA
250m 2220mm 30.5MoA low 10mph wind 8.25MoA
275m 2940mm 36.75MoA low 10mph wind 9.0MoA
300m 3740mm 42.75MoA low 10mph wind 9.75MoA
325m 4650mm 49.25MoA low 10mph wind 10.5MoA
350m 5700mm 56.0MoA low 10mph wind 11.25MoA
375m 6850mm 63.0MoA low 10mph wind 12.0MoA
400m 8130mm 70.0MoA low 10mph wind 12.5MoA
425m 9600mm 77.5MoA low 10mph wind 13.5MoA
450m 11100mm 85.0MoA low 10mph wind 14.0MoA
475m 12800mm 93.0MoA low 10mph wind 15.0MoA
500m 14700mm 101.0MoA low 10mph wind 16.0MoA
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Re: 22lr bullet drop on mildot reticle

Post by disco stu » 11 Oct 2021, 3:53 pm

Wow-very thorough. Thanks for that.
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Re: 22lr bullet drop on mildot reticle

Post by bladeracer » 11 Oct 2021, 4:15 pm

disco stu wrote:Wow-very thorough. Thanks for that.


I've been working on it for a while now :-)
Out to 250m I can get decent measurements. At 300m my group might measure 400mm across, so I'd have to fire 50rds at least to get a reasonably precise centre to measure the drop, and any wind changes affecting the bullet during that second of flight can still throw it out. If the target is 25m above or below my firing altitude, that also affects bullet elevation by 50mm at 300m. But a 10mph crosswind puts me 900mm off the target at 300m, so the biggest problem is getting onto the target first :-)
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Re: 22lr bullet drop on mildot reticle

Post by disco stu » 11 Oct 2021, 4:38 pm

And I'll be happy shooting 22 out to around 120m!
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Re: 22lr bullet drop on mildot reticle

Post by Biscuits » 28 Oct 2021, 9:02 am

If you go onto snipershide.com, on the rimfire page there is an internet competition fir best 6 x 5-shot groups at 50, 100, 200, 300 yards. I think someone has done a 400 now.

Your elevations look about right, but why not dial them instead of using holdover? I notice you are using HV ammo. The tightest groups on snipershide are using match ammo. Personally I use RWS R100, which comes out just supersonic, but is subsonic by 30 metres. It’s for 100+ metres, so it is made to be stable at transonic speeds.

Your scope will run out of elevation at about 300 metres unless you have thrown a lot of $$$’ at something with a 34mm tube and a canted mount.

Test your ammo at 100 metres; ammo which works fine at 50 can be rubbish at 100. If it is ok at 100, it should be ok at 200 or 300.

I have never got as good a group at 100 using HV ammo (about 1250 fps) as I do with R100 which is about 1150fps.

Consider buying a chronograph.
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Re: 22lr bullet drop on mildot reticle

Post by Bugman » 28 Oct 2021, 9:22 am

bladeracer wrote:Using your figures I get similar numbers - 81m, 105m, 127m, 147m, 167m.
Shoot groups at 50m, 100m, 150m and 200m, measure the trajectory, then calculate backwards to determine an accurate BC, assuming you have measured the muzzle velocity.

Beyond 300m, groups open up enough to make bullet drop measurement less than precise, but I believe my BC is reducing slightly past that distance. A 10mph wind speed from behind or ahead is enough to add or subtract about 80mm on the height of the bullet impact at 300m.

With CCI Standard Velocity in my 18" RPR I'm using this. Basically, from a 100m zero, bullet drop is 400mm (16") at 150m, 1200mm (4-feet) at 200m, 2400mm (8-feet) at 250m, 3900mm (13-feet) at 300m, 6000mm (20-feet) at 350m, 8300mm (27-feet) at 400m, 11300mm (37-feet) at 450m, 15200mm (50-feet) at 500m.
With my RPR .22LR with CCI SV I'm using this, but I'm zeroed at 100m, and I'm using minutes:
17.5m zero 10mph wind 1.1MoA
25m 31mm 4.25MoA high 10mph wind 1.3MoA
50m 90mm 6.25MoA high 10mph wind 2.0MoA
75m 80mm 3.75MoA high 10mph wind 3.0MoA
100m zero 10mph wind 3.75MoA (200yd dot in the 223BDC is at 110m)
125m 160mm 4.5MoA low 10mph wind 4.5MoA (300yd dot)
150m 395mm 9.0MoA low 10mph wind 5.25MoA (400yd dot is at 143m)
175m 710mm 14.0MoA low 10mph wind 6.0MoA (500yd dot is at 162m)
200m 1130mm 19.5MoA low 10mph wind 6.75MoA (top of the duplex post is at 182m)
225m 1630mm 25.0MoA low 10mph wind 7.5MoA
250m 2220mm 30.5MoA low 10mph wind 8.25MoA
275m 2940mm 36.75MoA low 10mph wind 9.0MoA
300m 3740mm 42.75MoA low 10mph wind 9.75MoA
325m 4650mm 49.25MoA low 10mph wind 10.5MoA
350m 5700mm 56.0MoA low 10mph wind 11.25MoA
375m 6850mm 63.0MoA low 10mph wind 12.0MoA
400m 8130mm 70.0MoA low 10mph wind 12.5MoA
425m 9600mm 77.5MoA low 10mph wind 13.5MoA
450m 11100mm 85.0MoA low 10mph wind 14.0MoA
475m 12800mm 93.0MoA low 10mph wind 15.0MoA
500m 14700mm 101.0MoA low 10mph wind 16.0MoA

Great info. This has helped me in a little dilemma I had using CCI standard. Ta muchly.
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Re: 22lr bullet drop on mildot reticle

Post by bladeracer » 28 Oct 2021, 12:10 pm

Bugman wrote:Great info. This has helped me in a little dilemma I had using CCI standard. Ta muchly.


No worries :-)
I'd be interested to see what curves others are using with whatever ammo they prefer too.
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Re: 22lr bullet drop on mildot reticle

Post by No1_49er » 30 Oct 2021, 8:42 pm

22BPCR (22 Black Powder Cartridge Rifle) silhouette match

Whether it's iron sights or glass, MOA change is the same

Winchester Low-wall
Lyman 17 front sight, modified with bubble level (definitely don't want cant)
Browning BPCR rear tang sight
Std. velocity target ammo
Chickens @ 50 mtr are "Zero"
Pigs @ 100 mtr, plus 5 MOA
Turkey @ 150 mtr, plus 5 MOA (+ 10 MOA from "zero")
Ram @ 200 mtr, plus 10 MOA (+ 20 MOA from "zero")
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Re: 22lr bullet drop on mildot reticle

Post by bladeracer » 30 Oct 2021, 10:21 pm

No1_49er wrote:22BPCR (22 Black Powder Cartridge Rifle) silhouette match

Whether it's iron sights or glass, MOA change is the same

Winchester Low-wall
Lyman 17 front sight, modified with bubble level (definitely don't want cant)
Browning BPCR rear tang sight
Std. velocity target ammo
Chickens @ 50 mtr are "Zero"
Pigs @ 100 mtr, plus 5 MOA
Turkey @ 150 mtr, plus 5 MOA (+ 10 MOA from "zero")
Ram @ 200 mtr, plus 10 MOA (+ 20 MOA from "zero")


Thanks No1_49er.
What ammo does that relate to?
Are those full- or half-scale silhouettes?
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Re: 22lr bullet drop on mildot reticle

Post by No1_49er » 31 Oct 2021, 4:29 am

Eley Match
Target sizing here : - http://www.22bpcra.com/wp-content/uploa ... /Sizes.pdf
A bit different to NRA sizing, especially Chickens which are shot off-hand. All others shot over crossed-sticks. Same as the c/f cartridge match
Rules here for those interested http://www.22bpcra.com/wp-content/uploa ... 1-2020.pdf
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Re: 22lr bullet drop on mildot reticle

Post by bladeracer » 31 Oct 2021, 9:40 am

No1_49er wrote:Eley Match
Target sizing here : - http://www.22bpcra.com/wp-content/uploa ... /Sizes.pdf
A bit different to NRA sizing, especially Chickens which are shot off-hand. All others shot over crossed-sticks. Same as the c/f cartridge match
Rules here for those interested http://www.22bpcra.com/wp-content/uploa ... 1-2020.pdf


Thanks for that.
I do wish Silhouette would stop shooting at the shape of animals though, and focus on actual kill zones.
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