Calibre question?

Rimfire and centrefire forum. Show us your setup, talk about ammo, ask advice or simply tell us what you use.
phoenix
BRUCE ALMIGHTY
Posts: 4447
Joined: 09 May 2012, 14:40
Location: Aberdeen

Re: Calibre question?

Postby phoenix » 10 Oct 2017, 21:04

I agree that not all the powder is burned in a 20" barrel and (because it's only used at night) flames are visible when the rifle is fired.
24 or 25 inches might be a good barrel length for a 22-250 if you're on the range or are in a high seat, but try to use a rifle with a 24 or 25 inch barrel with a sound moderator on the end of it when shooting from inside a vehicle and you'll soon realise that a short barrel does have it's advantages.
With 42gn of RS60 powder and a 50gn VMax bullet, the muzzle velocity from my 20" barrel Tikka T3 22-250 is 3800 ft/sec (1157m/s) and a muzzle energy of 1650 ftlbs (2237 joules) - which is more than enough for any fox.
In darkness, and using a thermal spotter to detect foxes and a thermal riflescope to shoot them, the biggest problem is range estimation - you can't easily use a laser rangefinder in the dark.
Therefore I use a calibre that (within reason) fires a bullet with the flattest trajectory possible , and which is heavy enough to ensure a clean kill.
Both 222 and 223 are perfectly good calibres for shooting foxes, but at extended ranges their bullets drop more than a 22-250 making it necessary to apply some "Arkansas Elevation"
As for the 22-250 and 243 being "barrel killers" - that depends rather more on the rate of fire rather than actual number of rounds being fired.
Each round fired puts a certain amount of heat into the barrel and between shots, the barrel loses heat to it's surroundings.
If shots are fired at a rate such that the heat going into barrel exceeds the rate at which heat can leave the barrel, then the barrel can overheat and be damaged
if I go to the range and fire 50 rounds in an hour, and do that regularly, then there's a good chance that the barrel life will be short.
But if I'm out shooting foxes and fire 3 or 4 rounds in a session lasting 4 or 5 hours, then the barrel life will not be compromised.

Cheers

Bruce
LAND ROVER - THE WORLD'S WORST 4X4 BY FAR

Wild-Boar
Posts: 4
Joined: 09 Oct 2017, 16:44
Location: Germany

Re: Calibre question?

Postby Wild-Boar » 10 Oct 2017, 22:22

In darkness, and using a thermal spotter to detect foxes and a thermal riflescope to shoot them, the biggest problem is range estimation

It is possible to make a privacy masking reticle like the russian scope https://upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Distance_meas.png/220px-Distance_meas.png for foxes.
I agree that short barrels are easier to handle.
Therefore I use a calibre that (within reason) fires a bullet with the flattest trajectory possible , and which is heavy enough to ensure a clean kill.

Thats right too. But today you can use brass bullets and have the same result with more moderate cartridges. For example this 223 http://lutzmoeller.net/1/5,6-mm/223-Rem.php something around 4 inch drop at 300 yards!

Cheers
Stefan

Sussexsteve
Posts: 99
Joined: 06 Oct 2013, 11:43
Location: Sussex

Re: Calibre question?

Postby Sussexsteve » 14 Nov 2017, 01:13

I shoot 204 and 243. Shot 100s with 223 and 22-250. All do the job if the bullets put in the right place. Don’t get runners. Dropped every fox I’ve shot with the 204 out to 330m with thermal scope.

Tikka222
Posts: 3
Joined: 20 Feb 2017, 17:06
Location: Cumbria

Re: Calibre question?

Postby Tikka222 » 16 Nov 2017, 14:56

I use 222 and 243 both have mods 243 deff the better caliber with mod you here the strike and there are no runners
Toddy

User avatar
Frogman Ladue
Posts: 460
Joined: 06 Apr 2014, 00:22
Location: USA, Ohio

Re: Calibre question?

Postby Frogman Ladue » 03 Dec 2017, 01:19

Has "the market" (over there) start feeding you guys on 22 Nosler, or 22 Wylde/.223 Wylde, or 224 Valkrye yet? Guys are going nuts over here to drop .223 like a bad habit.
Evolving work in progress, E700+DSA (Build Finished Feb2016)..Link

Last update to US spec'ed E700+DSA T-20,T67 Build. (US Parts List!)...Link


Return to “Rifles and Ammo”

Who is online

Users browsing this forum: No registered users and 2 guests