Any thoughts or suggestions on 6mm-250 AI vs 6xc or any other case in this size....I want to be able to use my HS magazine with 105 gr bullets seated long and I cannot do this with my 243 winchester. I've noticed the 243 is kinda fussy to find loads for. My Dasher was very easy to. I want something simple to load with known accuracy potential. This will be for a hunting rifle not target.
Rechamber 243 Winchester to 6-250ai,6xc,etc.
- Thread starter Jazz
- Start date
i rechambered mine as a 6brx and having an 8 twist, i could load 100 gr bullets but settled on 68 bergers for a varmint rig and it is very accurate..in the 2's and no ghog let go of the clover in it's mouth. a 6x47 lapua is similar to the cases you considered and with the fast twist will easily take deer sized game. the 6-06 has been around awhile and has it's followers. barrel life is reduced as the cartridge gets larger which is why i choose the 6 brx. so many choices...[/quote] if i can see you, i can touch you. BANG!
I loaded up a 6slr with a 105g amax at 2.79" and it feeds in my SA 700. It was originally just a factory 22-250. And I have a bit of room to spare.
Take a look at Roberts measurements and measure your mag, that'll tell you a lot.
As far as making the 6slr, easy! Use Whitley's dies and they turn out.
xdeano
http://6mmar.com/Super_LR.html
"With The 6mm Super LR/S Reamer:
For the 6mm Super LR/S Reamer above (i.e. with the .075" free bore, which has a shorter throating for across the course chambering, magazine feed rifles, varmint rifles shooting smaller or lighter bullets, etc.) the following bullet measurements were made to show at what OAL the noted bullets hit the lands:
DTAC 115's (Lot #204258) 2.842" OAL (A little back in case)
Berger 115 VLD (Lot #1422) 2.906" OAL (Good OAL)
JLK 115 VLD (No Lot #) 2.873" OAL (Ideal OAL)
Sierra 107 gr (Lot #0008747115518) 2.842" OAL (Ideal OAL)
Hornady 105 A-Max (Lot #2090321) 2.792" OAL (At jct of neck and shoulder)
Berger 108 gr BT (Lot #1539) 2.802" OAL (Good OAL)
Lapua 105 gr Scenar (Lot #LMLME1) 2.806" OAL (Ideal OAL)
Berger 105 gr VLD (Lot #1415) 2.887" OAL (Forward in neck a bit but works well)
Berger 100 gr BT (Lot #1945) 2.798" OAL (Forward in neck a little but works well)
Berger 80 gr Flat Base (Lot #800) 2.706" OAL (Good OAL)
Hornady 87 gr V-Max (Lot #2050099) 2.717" OAL (Good OAL)
Note: When the term "Ideal OAL" is used, it means the junction of the boat tail and bearing surface of the bullet is forward of the junction of the neck and shoulder of the case by about .025" or so. When the term "Forward in neck but good OAL" is used it means the junction of the boat tail and bearing surface of the bullet is forward of the junction of the neck and shoulder of the case by about .040" - .070" or so (depending on the bullet involved) which is still good because the cartridge neck is .322" which means you have about .250" plus of neck still holding onto the bullet. "Good OAL" means the bullet junction of the boat tail and bearing surface is still ahead of the neck and sholder of the case. "Back in case" means part of the bearing surface of the bullet is back beyond the necks/shoulder junction (although the bullets still shoot very well there in many cases)."
Take a look at Roberts measurements and measure your mag, that'll tell you a lot.
As far as making the 6slr, easy! Use Whitley's dies and they turn out.
xdeano
http://6mmar.com/Super_LR.html
"With The 6mm Super LR/S Reamer:
For the 6mm Super LR/S Reamer above (i.e. with the .075" free bore, which has a shorter throating for across the course chambering, magazine feed rifles, varmint rifles shooting smaller or lighter bullets, etc.) the following bullet measurements were made to show at what OAL the noted bullets hit the lands:
DTAC 115's (Lot #204258) 2.842" OAL (A little back in case)
Berger 115 VLD (Lot #1422) 2.906" OAL (Good OAL)
JLK 115 VLD (No Lot #) 2.873" OAL (Ideal OAL)
Sierra 107 gr (Lot #0008747115518) 2.842" OAL (Ideal OAL)
Hornady 105 A-Max (Lot #2090321) 2.792" OAL (At jct of neck and shoulder)
Berger 108 gr BT (Lot #1539) 2.802" OAL (Good OAL)
Lapua 105 gr Scenar (Lot #LMLME1) 2.806" OAL (Ideal OAL)
Berger 105 gr VLD (Lot #1415) 2.887" OAL (Forward in neck a bit but works well)
Berger 100 gr BT (Lot #1945) 2.798" OAL (Forward in neck a little but works well)
Berger 80 gr Flat Base (Lot #800) 2.706" OAL (Good OAL)
Hornady 87 gr V-Max (Lot #2050099) 2.717" OAL (Good OAL)
Note: When the term "Ideal OAL" is used, it means the junction of the boat tail and bearing surface of the bullet is forward of the junction of the neck and shoulder of the case by about .025" or so. When the term "Forward in neck but good OAL" is used it means the junction of the boat tail and bearing surface of the bullet is forward of the junction of the neck and shoulder of the case by about .040" - .070" or so (depending on the bullet involved) which is still good because the cartridge neck is .322" which means you have about .250" plus of neck still holding onto the bullet. "Good OAL" means the bullet junction of the boat tail and bearing surface is still ahead of the neck and sholder of the case. "Back in case" means part of the bearing surface of the bullet is back beyond the necks/shoulder junction (although the bullets still shoot very well there in many cases)."
peterf225
Silver $$ Contributor
Jazz said:
Not very hard at all. I take the 6.5x47 brass and run it through a 6x47L Forester FL sizing die, load, and shoot. My 6x47L feeds perfect out of the internal mag of my Rem 700 (rifle started life as a 22-250). I load 105 Lapuas to 108 Berger BTs. I have had no problems getting it to shot sub 1/2 MOA. I shoot this rifle in 600 yd comps and have won 2 with it.
Got a SPS .243 barrel and had .12" removed from the chamber (with the barrel shoulder relocated the same amount) with no other change. This allows you to use .22-250 brass and the result is the good old 6MMX that you an reload with lathe shortened .243 dies. No more seating depth trouble and a very efficient cartridge.
So do you plan on making this 6-250 an AI version? If so you'll have to fireform your brass which will burn up time and money.
Of the two, i'd probably go with the 6-6.5x47L, good brass already, all you need to do is neck the stuff down. Which is a good thing.
I'd still do the 6SLR, bit more powder capacity. That was one factor that I looked at, other than that it's basically the same case as the 47L. I'm currently in the process of getting one put together.
xdeano
Of the two, i'd probably go with the 6-6.5x47L, good brass already, all you need to do is neck the stuff down. Which is a good thing.
I'd still do the 6SLR, bit more powder capacity. That was one factor that I looked at, other than that it's basically the same case as the 47L. I'm currently in the process of getting one put together.
xdeano
On the 250, it will not be an AI version, it will be just like the 6 SLR only with the 22-250 parent case. I saw an article on it by Robert but I do not see it listed on his site. I am leening towards the 6-6.5x47 but I have read some posts where people eventually have to next turn their brass. I don't want to do that.
Neck turning isn't the end of the world. It just gets you further down the rabbit hole is all.
I'd go with a coin toss. ;D
I have also heard that the 47L necked down to 6 will cause donuts because the brass has to go somewhere. The nice thing about using the 250 brass is you'll be necking up. Just watch your neck thickness.
Just a couple more reasons why i'm going with the slr. It's just easy. no necking up or down and no neck turning if you use win/rem brass, and you still get great results.
xdeano
I'd go with a coin toss. ;D
I have also heard that the 47L necked down to 6 will cause donuts because the brass has to go somewhere. The nice thing about using the 250 brass is you'll be necking up. Just watch your neck thickness.
Just a couple more reasons why i'm going with the slr. It's just easy. no necking up or down and no neck turning if you use win/rem brass, and you still get great results.
xdeano
6xc got my vote
-Norma brass
-Runs perfect out of short action
-Bullets seat long, no bearing surface past juncture.
Take brass out of box, inspect, load and shoot. Put 38.0gr H4350 (mild load) on 105-108 bullet and fine tune from there. This isn't a finicky round at all, I actually think it's got the best of all attributes. I run it in my hunting rifles and my benchgun. It flat out works..
-Norma brass
-Runs perfect out of short action
-Bullets seat long, no bearing surface past juncture.
Take brass out of box, inspect, load and shoot. Put 38.0gr H4350 (mild load) on 105-108 bullet and fine tune from there. This isn't a finicky round at all, I actually think it's got the best of all attributes. I run it in my hunting rifles and my benchgun. It flat out works..
XTR
F-TR obssessed shooting junkie
I run 107SMKs or 105 Hunting VLDs in my R700 6SLR. My reamer has a 76FB and a 275 neck. I can seat into the lands with the VLD and can feed with lots of room from AICS mags with the front plate, about the same OAL limit as a standard R700 box mag. In any bolt gun I'd get at least a 115
I said it in another thread, the 6SLR is a wildcat with training wheels. All you do is size new brass load and shoot. It adds about nothing to your loading regimen. Anyone out there is at the very least going to run new brass over an expander before they load it.
I'm sure you can shoot them faster, but I'm running the 107/105 at about 3100FPS.
I said it in another thread, the 6SLR is a wildcat with training wheels. All you do is size new brass load and shoot. It adds about nothing to your loading regimen. Anyone out there is at the very least going to run new brass over an expander before they load it.
I'm sure you can shoot them faster, but I'm running the 107/105 at about 3100FPS.
Actually, a necked up 22-250 to 6mm is the 6 creedmoor. I've done it already.
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