20-250 AI has better BC than my 22-243 AI

dan brothers

dan brothers

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Unless I'm Screwie Luie ... which is possible...LOL.... my 20 does better than my 22.

Better at some places...and really close at others... especially when comparing 600 and 800 yds.

But of course the 80 gr has more energy... but I get hung up more on drop and wind drift differences.

20-250 ... 55gr Bergers 3770fps at 300yd zero =

wind 10mph at 3o'clock

400 yd......... 500 yd ....... 600 yd...... 700 yd........ 800 yd.......



yds ...drop... wind ... ... velocity ... energy

400 ...6.39 .... 8.91 .. 2799 ... 956
450 ...11.29 .... 11.54 .. 2686 .... 880
500 ...17.47 .... 14.58 .. 2574 ... 809
550 ...25.06 .... 18.06 .. 2466 ... 742
600 ...34.19... 22.01 .. 2360 ... 679
650 ...44.99... 26.45 .. 2256 ... 621
700 ...57.61... 31.42 .. 2156 ... 567
750 ...72.21... 36.96 .. 2058 ... 517
800 ...88.94 ... 43.09 .. 1963 ... 470
.




22-243 ... 80gr Amax 3558 fps at 300 yd zero =


wind 10mph at 3o'clock

400 yd......... 500 yd ....... 600 yd...... 700 yd........ 800 yd.......



yds ... drop ... wind ... velocity ... energy

400 .. 7.00 ... 8.63.. 2706 ... 1299
450 .. 12.32 ... 11.15. 2606 ... 1206
500 .. 18.99 ... 14.05. 2509 ... 1117
550 .. 27.14 ... 17.35. 2414... 1034
600 .. 36.88 ... 21.08. 2321 ... 956
650 .. 48.36 ... 25.26.. 2230 ... 882
700 .. 61.70 ... 29.92.. 2141 . ... 814
750 .. 77.08 ... 35.08. 2055 ... 749
800 .. 94.63 ... 40.78. 1970 ... 689



22-250 .... 55gr Blitzking ...3800 fps

yds ...drop... wind ...

400... 8.87.... 17.25
450... 15.97... 22.58
500... 25.17... 28.88
550... 36.77... 36.26
600... 51.03... 44.84
650... 68.25... 54.75
700... 88.71... 66.10
750... 112.76...79.00
800... 140.99... 93.51

 
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Well unless I can't read or don't understand....
I see the 22 winning in the wind dept. Which is more important at greater distance , than drop.
 
Originally Posted By: Tim Neitzke Which is more important at greater distance , than drop.

+1


Looks like they are neck and neck until about 600 than the 22 really starts to shine in the wind. But as Dan points out 2.5 is not much!

 
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A 20-250 Ack Imp sounds like a lot of fun to me but how realistic and or what does it take to get to 3770 FPS out of one of these??

I often read about these incredible FPS numbers being thrown around but to achieve the speeds some are claiming, it takes substantial over pressures to get there and I'm just not sure that's always such a good idea.

It takes a healthy dose of powder, usually close to redline, for a 22-250AI to push a 55 grain bullet 3750 so a same weight bullet but smaller bore will typically require more effort to get it there, how much I don't know but I'll bet it's likely in the red.
 
Originally Posted By: B23A 20-250 Ack Imp sounds like a lot of fun to me but how realistic and or what does it take to get to 3770 FPS out of one of these??

I often read about these incredible FPS numbers being thrown around but to achieve the speeds some are claiming, it takes substantial over pressures to get there and I'm just not sure that's always such a good idea.

It takes a healthy dose of powder, usually close to redline, for a 22-250AI to push a 55 grain bullet 3750 so a same weight bullet but smaller bore will typically require more effort to get it there, how much I don't know but I'll bet it's likely in the red.


My standard 22-250 is pushing a 52 gr bullet across the chronograph at 3935fps. That's with a published max load of AR Comp from a 26 in barrel. I would expect the 22-250AI to top that... I geuss my chronograph could be that far off...
 
40.0 grs of IMR 4350 pushes these 55 Bergers at 3770, produces 1" groups at 300 yds.

40.5 gr = 3815 fps... 41.0 gr =3865 ... 41.5 gr = 3950 fps (that's when it gets on the hot side)... but the groups are not as good... so I'm staying with 40.0.

Right now it shoots like a summer breeze on a beach, while being rocked in a hammock, fanned by a brown skin Beauty... and being feed seedless grapes.

 
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B23... if your too hot...then try a slower burning powder.

My only reason for building these two rifles was for Max BC for Long Range Coyote Killing.

Right now 500-800yds is long range for me, even though I haven't shot any yotes past 405yds... but I WILL. I just have to gear up for it and put myself into those opportunities.

If your not thinking hard about shooting past 400yds, then any good quality varmint rifle and load will do that with very good BC.... in ALL REALITY... it's just turret turning after 400 yds anyways no matter what the BC is.

Many here have shot coyotes a lot farther than I have with no special weapons... but I haven't ...YET...LOL.


PS... This site is a great place to get your facts.

VORTEX LRBC

Long Range Ballistics Calculator

http://apps.vortexoptics.com/lrbc/
 
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Okay... I know I'm loosing it now, because I thought about getting one of my 22-250 rifles running 3800 fps with those 55 gr Blitzkings... but ran the numbers on it, as compared with my other two calibers that I posted yesterday.... I was shocked... there must be a mistake somewhere, because it shows this load doing twice as bad as my other ones.

Can that be true?

I posted this Blitzkings chart up there in the original post with the other two.
 
Wow, all I know is a 80 AMAX at 3560 is freaking smoking! I know a guy who builds quite a few 22 LRV's (which is essentially a 22 XC) and about 3450 is really pushing it in the Claymore action/Bartlien barrel combo he uses.

An 80 AMAX at that speed is super, super flat. I would take the smidge better wind drift, and the added energy at distance over the 20-250 every time. Out that far a coyote is a little bitty target. Miss your range or wind call just a hair shooting through canyons with swirling winds and you have a marginal hit. And for that I would take the heavier bullet every time. But that is just me. Where I shoot a wind can have 3-4 different calls/directions before you get to 800.

I'm not trying to tell you how to do things, just giving my opinion on how they work for me.
 
Probably be best to just go ahead and get both.
thumbup.gif
 
Get both...? LOL.... I have both...LOL.

I believe your right JTP about going with the 80 grainer... it has the advantage in the wind for sure.

Not that I've ever shot at a coyote that far... but I hope to some day...LOL.

Magnospeed told me that 50.2 grs of Retumbo was pushing them on a average of 3558fps.

51.0 grs had it up to 3623 average.
 
You just aren't going to get any better coyote ballistics than that IMO, for sure not at the price point of that 80 AMAX. Learn the ballistics well, and go kill coyotes! I bet it is pretty dang rough on them under 200 yards.
 
I expected the 80amax to do well... but it's hard to believe that a 55gr, 20 caliber bullet can do so much better than a 55 gr 22 caliber bullet... that just doesn't seem possible that it would make that much difference.
 
I hope to answer some of these questions soon...............I have a ,22-243 AI that is amazing shooting 75 or 80 grain bullets. Dan led me down the road of the .20-250 AI and the "Beast" will be up and running soon. It is set up for the 55 grain Berger's. For a 400 yard and under rifle this will be the BOMB ...............
 
My 22-243 is pushing a 75gr Amax at 3682fps. The cartridge is simply amazing! I had it built as a hunting rig so I wouldn't waste the barrel on steel target, but dang it so much fun to shoot! Lol
I've shot mine all the way out to 1250yds with a load that was a little slower than my current load. The elevation was just under 30MOA.
 
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