Coyote calling rifle 20-240 or 22-243?

[zr600]

Ok I want a super flat accurate rifle for calling coyotes and am thinking one of these two calipers leaning more to the 20 cal thinking that it might be a hair more fur friendly. Plus most of the heavy 22 cal bullets are match stuff and I know Black Hole 55g 20 cal bullets work good on coyotes. Any help would be great.

[hereinaz]

I've heard guys leaving the .204 Ruger because it didnt put them down. It kills em sure, but they lost ones with a .204 they would not have with a .223 or 22-250. Not sure what you gain with a 20-240 in that case.

How far are you shooting? Seems like the .20 cal would be limited if you are reaching out. While .224 cal bullets are proven.

Why the exotic chambering and not .204 Ruger or 22-250? Or, 220 swift? Just the super flatness? I'm genuinely curious. Do you have data on them?

[zr600]

Actually this is the 20-250 and a 55g 20 cal bullet will have a higher bc then a .224 cal of the same grain bullet would have. Yes I have read some stuff just haven't figured out exactly what I want to do yet. The 55 g 20-250 would shot flatter and have less windage then a 55 g 22-250.

[hereinaz]

The 20-250 sure sounds interesting with a 55gr bullet as a dedicated coyote rig. What size bullet would you shoot in the .22 caliber?

[zr600]

In the 22-250 I have currently I have shot 52-65g but they don't get nearly as fast as what the 20-250 would push them. The 20cal 55 g bullet still has a higher Bc then them bullets in the 22 because to make the bullet the same weight in a smaller caliper they are longer which gives them there higher bc which will give them a better trajectory.

[hereinaz]

I like the idea of the 20-250.

[sharpshooter]

You might not like the idea of a 500 rd barrel life.

[thatguyshm]

I'm trying to wrap my head around this one. So more bearing surface with a .204 55gr pill, how is it getting there any faster than same weight .224 cal 55gr projectile, with brass being the same?

I'd love to see some data to back this one up.. just doubtful on real world application.. where is the data coming from?

[schnyd112]

.220 swift, 50g Vmax over 4064. 4100 fps of coyote grenade. I cannot remember a bullet exiting. They sure don't run away after being hit with one.

As as to the smaller caliber bullet- it makes complete sense. A 140 from a 7-08 does not go as fast nor does it have the ballistic coefficient of a 140g from a .260, which is the same parent case. You get a longer bullet and more pressure because you are pushing the same amount of lead down a smaller bore which in turn will give you more velocity.

[thatguyshm]

A 140gr 7mm-08 with H4350 has a velocity spread of 2692-2868, with 140gr 260 has a spread of 2530-2677. I'm sure the bullets are slightly different, but that rule stands, more bearing surface less velocity. I'm simply stating speed from the muzzle. I'm not talking retaining velocity, wind deflection, anything but pure bad ass American speed. What they are doing at 100 is a different story.

[schnyd112]

Bearing surface between 2 bullets of the same weight and caliber will be the only thing you changed, so a longer bearing surface may increase resistance enough to lower the speed. We aren't talking about the same caliber, it's a smaller hole, using similar powder charges, pushing the same weight bullet. The change in diameter outweighs the change in bearing surface, increasing the pressure.

The 7-08 and .260 were bad examples because a 140 7mm bullet is nothing like (shape, construction, use) a 140 6.5 bullet. I also Wouldnt rely on that book data. I regularly see .260's well above 2700 using h4350. I have not seen a 7-08 that pushes a 140 more than 2750, but I only have experience with one and we shot facory ammo out of it.

[thatguyshm]

How about 223 Remington with a 36gr bullet, H335, 3647-3790, 20 practical same powder, 36gr bullet 3518-3751. I'm not talking about what you can stuff in a case and pull the trigger. I'm talking about what you can keep in safe pressue margins, not just what your primer looks like. Yes you will create more pressure with a smaller bore and same weight bullet. Its longer, its going to happen. I load for the 338 federal and 308. 30-06 and 338-06. I'm just observing, and still not seeing any data from this round. Trying to help someone understand that yes it will go fast, but the pressures increase with long slippery bullets. All load data is taken off Hodgdons website, and the pressure of the max load of practical is 1k more than the 223.

[keeki]

My 25/300wsm makes a mess of them.lol

[keeki]

People have no idea what a 90gr blitzking will do to yote when it leaves the muzzle around 3900fps

[LoneWolf]

22x47L.


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[justinp61]

Why not a 22-250? Fast, accurate and available just about anywhere centerfire ammo is sold.

[zr600]

I reload so ammo not even a consideration I know this round is a barrel burner that's why I'm planning on a savage build it going to be for calling coyotes and that's it. It will shoot flatter have less wind drift and have more energy then a 22-250. All about bullet bc. If you google search there is some information on this round quit a few stuff on predator masters too. Was just trying to get some more advice from some of the savage pros around here that have built off these rifles before.

[sharpshooter]

I can tell you for a fact, because I have a 20x47 Lapua that will shoot 55 Bergers @ 3875 fps, and will cut through the wind better than any 6 mm bullet clear out to 1000 yds. It is probably the flattest shooting caliber on the planet. From a 200 yd zero, it only needs 14.5 moa elevation to get to 1K. The time of flight is so fast you can't even see a bullet wake. Stan Taylor of Douglas Barrels shoots one very regular at 1000 yd matches and actually wins.
Down side is barrel life, my first barrel lasted about 600 rds before it lost it's guilt edge, and at 800 it was toast.

[hereinaz]

20x47 sounds crazy. Now I think I need one...

[Zero333]

223 wssm
22-284

Those will shoot flatter than the 20-250 and hit with twice the authority !

22-284 can get 55 grainers at 4,000 fps in a 26" bbl with out reaching 60,000 psi.

223 wssm will also easily get 4,000 fps with 55 grainers in a 26" bbl but at the expense of slightly higher pressure than the 22-284, but still well within safe pressure levels.