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I shoot a single shot 22BR 1:12 twist, launching 55 grn SBKs @3580fps it groups 2" at 500yds and i have taken rabbits at 470 yards and crows at 430.

Longest fox was 230yds, unless you really want to stretch the range i dont think you need to go for fast twists and heavy bullets, just use a more suitable calibre, personally when i want to reach out past 500 i pick up my 257 AI.

 

Ian.

You cant beat capacity !!.

 

A

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im now about to do a .22/270 wsm for fun shooting

 

barrel life will be an issue

My 20BR builder built a couple of 22/4000s in the late 60s, 22 caliber on a 7x57 case, 55gr grain bullets at 4000 fps when downloaded, BSA CFT action. Years ahead of his time.

 

A

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What sort of velocities from what length of barrel an you obtain with the heavies from the dasher Vince?

Just over 3400fps with the 80 gn bullet. Barrel? I think my current one is 30 inches

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Why not the .22 Valkyrie ?

 

.284 necked down to .22.

 

A friend uses one on varmints past 600 yards. his furthest was a magpie at just over 900.

 

A laser beam with a barrel life of around 900 rounds.

 

I have the reamer....if I could find an excuse to own one...I would.

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Why not the .22 Valkyrie ?

 

.284 necked down to .22.

 

A friend uses one on varmints past 600 yards. his furthest was a magpie at just over 900.

 

A laser beam with a barrel life of around 900 rounds.

 

I have the reamer....if I could find an excuse to own one...I would.

What bullet is he using? Sure I read somewhere it will push a 40gr v-max @ 4500fps.....

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He,s using a 90 grain berger of some sort....and they stay together. The barrel is 35" long. He,s getting over 4000 fps out of it from memory.

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What has helped in this wildcating is improved powders,and bullets that don't spin destruct.

 

Newton was into it in 1912 (see Landis '22 varmint rifles' for the early pioneers,when it was new under the sun.

Then Donaldson(1934 ish 22 Lightening);Gipson and Gebby in 1940s ( 22/250eventually) and of course the 220 Swift.

The the 22/243 Middlestead class and 224 Clark (7-57 based).Plenty work too on the 22-06 variations (22-03 even)

 

At least one '22/270' reported in SA managed 40G @ 4600 approx-the 22x64

Jim Carmichael's Cheetah (22-308) got 50g @4285,and there are reports (loud!) of 35g reaching 4999 (limit of chronos0-but here we may be also be pushing pressures,so don't try it at home.... barrel life of up to 1500 has been 'estimated'.....

 

Ackley in 1960's got to 50g@4600;and there is the 22 Eargesplitten Loudenboomer as a cautionary tale...let alone the 17 Flintstone Super Eyebunger,or 6mmThermos bottle (presumably quite a hot number..)

 

The issues of course began to centre on bullet integrity at very high speeds of rotation-barrel life was just accepted as limited,and the understanding that beyond 400y (a long way for early varminters) BC just could not be ignored-so heavier bullets/larger caliber became the focus (these helped the 22-250 class too ).

 

Bruce Potts reports on a 22-284 (or necked down 6.5-284).

He got 3494fps with 75 g bullets,but another grain and a half powder added only 19fps,suggesting a peak.

With 55g bullets,he managed 3950 fps before peaking out.

 

Swift (SAAMI) 55g@3680 and BC .255 gives 164/94" drop/10mph drift for those 800y speculative walk ins.

 

243W (SAAMI) 55@3850 and BC .277 gives 133/77 for 800- a tad better but hardly laser (nothing is).

 

243w (SAAMI) 70@3450 BC .309 gives153/77

 

 

243 WSSM (SAAMI) 55@4060 BC.276 119/72

 

6.17 LSpitfire (SAAMI) 85@3618 BC.404 119/57

 

223 WSSM (SAAMI) 55@3850 BC.276 138/77

 

and so it goes....better by far (or near) to limit distances to nearer half the "PB/occasional hits" for sentient targets.

 

Pure fun though,is not to be discounted by simple physics or comercial availability....though the latter is there-partly due to wildcatters!

 

gbal

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On 4/14/2016 at 11:52 PM, The Gun Pimp said:

Just over 3400fps with the 80 gn bullet. Barrel? I think my current one is 30 inches

Hi vince is there any chance you sending me your email address   so i can have a chat about your .22 Dasher please , thanks Lee

Edited by lee w 118

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