243 v 243ai

[22/250 foxer]

hi land have any of you changed your 243 when worn out for a 243 ai ? if so is it really worth the extra fps. or are there other things you benfit from to ?

 

improved accuracy ? longer brass life, ? etc

 

what sort of barrel twist did you have and what sort of bullets do you feed them. i no it depends on the twist rate and what you want out o the rifle ?

 

but some info would be nice on the matter.

 

also who done the work on the rifles

 

cheers for any advice

[Foxshooter]

hi land have any of you changed your 243 when worn out for a 243 ai ? if so is it really worth the extra fps. or are there other things you benfit from to ?

 

improved accuracy ? longer brass life, ? etc

 

what sort of barrel twist did you have and what sort of bullets do you feed them. i no it depends on the twist rate and what you want out o the rifle ?

 

but some info would be nice on the matter.

 

also who done the work on the rifles

 

cheers for any advice

 

 

Yep I did

 

increased accuracy, increased range (now happy out to 1000yards) great brass life too.

 

I had a 1 in 8 twist 8 contour barrel fitted to shoot the 105AMax or 107HPBTM I wanted it as a range gun primarily so I wasnt worried about the weight but its also licenced for deer

 

Mine was built by Riflecraft. Andrew has built/tweaked most of my rifles now

 

Mark

[devilishdave]

I have had a .243 AI built this year but spent most of the year over seas so not had much chance to try it. It is a 1:8 twist to stabalise the heavier rounds. I am just in the process of loading up some 105 AMAX so I will see how that shoots but the 87 grain VMAX I was fire forming with produced consistantly sub inch groups with my best being .18 and .2 centre to centre.

 

 

I am under no ilusions that the larger groups were down to the nut behind the butt!!

 

 

All the work on my rifle was done by border barrels. The way I looked at it I was going to get the rifle rebarreled any way so I might as well get it done as an ackly because I was intending on pushing the heavier rounds predominantly for deer but also for a bit of range work.

 

Dave

[Andrew]

Yep I did

 

increased accuracy, increased range (now happy out to 1000yards) great brass life too.

 

I had a 1 in 8 twist 8 contour barrel fitted to shoot the 105AMax or 107HPBTM I wanted it as a range gun primarily so I wasnt worried about the weight but its also licenced for deer

 

Mine was built by Riflecraft. Andrew has built/tweaked most of my rifles now

 

Mark

 

I'm willing to bet that the increased range/accuracy was due to the quality of the build and twist selection, rather than any added ballistic qualities of the AI cartridge. ~Andrew

[22/250 foxer]

thanks lads will the 1 and 8 twist shoot the lighter bullets to then ?

[6BR]

very happy with the standard .243 for now sending 58gr v-max @ 3900 and 87gr v-max @ 3300+ both 3/8 groups.

[Andrew]

very happy with the standard .243 for now sending 58gr v-max @ 3900 and 87gr v-max @ 3300+ both 3/8 groups.

 

6BR: Those 55 grain V-Max speeds and accuracy mirror that of my Model 70 .243. What is your load? ~Andrew

[6BR]

Hi Andrew

for the 58gr v-max I use 45.5gr of R15 and for the 87gr v-max 45gr of H4350 fully preped lapua cases and fed 210m primers.

[skany]

If ur having a custom barrel i dont see a reason not to ahve it AI'd

 

not like its going to cost anymore!

 

mine shot just as good fireforming as it did formed!

 

ID hav gone 1-8 if & when i do it again!

 

every 1-8 i hear about also shots the light stuff but when i did mine i was woried it wouldnt!

s went 1-12

 

cheers Andy

[eldon]

Can someone just put some bullet weight ranges to the twist rates of 1:8, 1:10, and 1:12 so that we less informed (me) can see where we want to be?

 

Whats a standard sako, 1:10 ?

[20Tac]

Can someone just put some bullet weight ranges to the twist rates of 1:8, 1:10, and 1:12 so that we less informed (me) can see where we want to be?

 

Whats a standard sako, 1:10 ?

 

http://www.riflebarrels.com/products/caliber_twist_rates.htm

[dannyt]

try it with the new 308 brass from lapua , small primer pocket?

[Foxshooter]

I chose a 1:8 specifically to throw the 105/107gr pills

 

I was advised that I shouldnt bother with anything below 70gr and that really was the bottom.

 

I used to throw 58gr VMax's with the old .243Win Rem700

 

Mark

 

Can someone just put some bullet weight ranges to the twist rates of 1:8, 1:10, and 1:12 so that we less informed (me) can see where we want to be?

 

Whats a standard sako, 1:10 ?

[eldon]

Cheers, I am quite happy with the standard 243 with 80 gr bullets but might go this route myself when re-barrelling.

 

1 in 8 seems the option then.

 

Am I right in thinking with regard to reloading, the only thing to do different is to leave the round OAL too long to seat the brass and the rest is done with a pull of the trigger( with obvious safe load ). Then I'd need new dies for full sizing at some stage.