MIA

[usmc 89]

usmc 89,
Sitting in my safe is a 22-6mmAI barreled action. Rem 700 with a 27"lilja #7 contour. I picked it up last month; sounds like it would be pretty close to your Middlestead.? The only problem is it's a 1 in 12 twist(That's why I got it so cheap). I think I'm going to rechamber it to a 22-250AI so the twist will match caliber a little better. What does that Middlestead do with 80gr A-maxs or equivilent?
Scott

your 22-6ai has alot more capacity than my middlested the problem with that chambering in a 1-12" twist is you cant use enough faster buring powder to make a light bullet achieve much mor velocity than a middlested and you dont have that twist to stabalize a heavier bullet to take advantage of heavier bullet. my middlestead case is a 243 slightly improved but with the shoulder pushed back to create a longer neck thus it looks like a shortened 6mm ai. you may want to think about a 22-243 instead of a 22-250 ai for the fact the 243 is a heavier built case and handles the higher pressures better than the less reinforced 22-250 case just a thought.

 

[usmc 89]

The biggest problem with that philosophy is the wind wreaks havoc on little bullets at long range and the retained energy is pretty low for anything but varmints. We have a fare amount of it (wind) out here too. The drop is amazing out to 5-600 but it's hard to beat big high bc bullets way out there. They would be fun out to 5-600yds on coyotes and down in size though.

you are correct its all based on time of flight initially the light high velocity low b.c. bullet will shoot flatter but it is shedding velocity rather quickly. once you break the 600 yard mark this will become apparent. the longer it takes the bullet to get from point a to point b the longer physics applies to it creating greater drop and deviation. gravity is consistant, every bullet will drop the same amount regardless what speed it is fired at the key is to shorten the time from when the bullet leaves muzzle to when it impacts this is done by retaining velocity, either by starting out with a huge initial velocity or reducing the shedding of velocity via a more efficient bullet ie high bc bullet. i my self like prefer slower high bc bullets for long range shooting.

 

[muleman]

usmc89,

your 22-6ai has alot more capacity than my middlested the problem with that chambering in a 1-12" twist is you cant use enough faster buring powder to make a light bullet achieve much mor velocity than a middlested and you dont have that twist to stabalize a heavier bullet to take advantage of heavier bullet. my middlestead case is a 243 slightly improved but with the shoulder pushed back to create a longer neck thus it looks like a shortened 6mm ai. you may want to think about a 22-243 instead of a 22-250 ai for the fact the 243 is a heavier built case and handles the higher pressures better than the less reinforced 22-250 case just a thought.

I like the thought... I'd still be limited to bullets under 60gr but your right about the 243 case design being a little stouter. Another plus would be that it would be easier to rechamber. I still think it would be severly overbore and not the best twist. I'd prefer an 8 or 9 twist for that much capacity. That way you could shoot the 80gr bullets. It always seemed to me that that the 22-250 was made for the 50 grainers.
Thanks for your thoughts
Scott
P.S.
Welcome back!

 

[Woodycreek]

The biggest problem with that philosophy is the wind wreaks havoc on little bullets at long range and the retained energy is pretty low for anything but varmints. We have a fare amount of it (wind) out here too. The drop is amazing out to 5-600 but it's hard to beat big high bc bullets way out there. They would be fun out to 5-600yds on coyotes and down in size though.

you are correct its all based on time of flight initially the light high velocity low b.c. bullet will shoot flatter but it is shedding velocity rather quickly. once you break the 600 yard mark this will become apparent. the longer it takes the bullet to get from point a to point b the longer physics applies to it creating greater drop and deviation. gravity is consistant, every bullet will drop the same amount regardless what speed it is fired at the key is to shorten the time from when the bullet leaves muzzle to when it impacts this is done by retaining velocity, either by starting out with a huge initial velocity or reducing the shedding of velocity via a more efficient bullet ie high bc bullet. i my self like prefer slower high bc bullets for long range shooting.

I'm with you guys on the higher B.C. bullets and barrel life is way better. I think some of those barrels burned out at 1000 rounds. They just like to play with different stuff.