Airforce Zeroing Texan 457 Carbine

[Skidecat]

Having issues Zeroing my Airforce Texan Carbine CF in 457. I have topped off the tank at 250 bar after each shot. Tryws the tuning wheel and try good quality bullets. 290 grain Mrhollowpoint
350 gain nsa and other ammo but I can not get a consent group at 100 yards

 

[Gerry52]

If you're topping off after each shot keep in mind you might be consistently ABOVE the gun's "sweet spot" (where it shoots most EFFICIENTLY). My guns CAN be filled to 250 but shoot most efficiently starting at 240-235bar. That's why I don't fill to 250. One of the idiosyncrasies of airguns.

 

[Skidecat]

If you're topping off after each shot keep in mind you might be consistently ABOVE the gun's "sweet spot" (where it shoots most EFFICIENTLY). My guns CAN be filled to 250 but shoot most efficiently starting at 240-235bar. That's why I don't fill to 250. One of the idiosyncrasies of airguns.

Thanx Gerry,
I was wondering the ammo I have is:

Mr. Hollowpoint 280g hp 415 hp
NSA 350hp
Seneca 250hp
What would you recommend at 100 yards for a tight group?

 

[Dave_lee]

Make sure your barrel is clean mine leads up pretty quick ihave 3 45s 290 and 350 nsa work best for me

 

[wimpanzee]

i get best results with the nsa 290s at 850fps, for 3 shots starting at 230bar. Only time i fill to 250 bar is if i am gonna be in the cold shooting it...it will be 230bar by the time it chills in a blind. I am not sure what the power wheel is at to get there...i just fiddled with it until it seemed pretty happy. I can usually get 2 touching shots and then one lower shots about 2-4 inches lower, at 100 yards.

 

[Skidecat]

Hi guys,

This is alot of help, please keep the comments coming.

 

[wimpanzee]

Hi guys,

This is alot of help, please keep the comments coming.

My understanding is the carbine likes a slightly lower than max pressure, and any higher wastes some air due to the shorter barrel

 

[RM.510bigbore]

Having issues Zeroing my Airforce Texan Carbine CF in 457. I have topped off the tank at 250 bar after each shot. Tryws the tuning wheel and try good quality bullets. 290 grain Mrhollowpoint
350 gain nsa and other ammo but I can not get a consent group at 100 yards

Make.sure your barrel is clean....No lead....Some.barrels.are.good.some.are.bad..The other major thing.is your base and mounting accessories... My 510 will move.most bases under recoil except for.Airforce BKL base..My .510 CF 34 inch shoots at 3625 psi . I shoot tethered off external regulator.. I couldn't get my .510 to shoot well until i.made a.stock.for it , tensioned barrel full 1inch carbon fiber.. You have good slugs...You might wanna slug your barrel and find.out the bore.diameter... The right slug the right bore diameter is real.important on airgun s.. The best my .510 Texan does.at 125 yards is a.average of 2-4 inch 5 shot groups...I cast and powder.coat.myself....When I started my Texan was very inconsistent with a rough barrel....

 

[The Archer]

Thanx Gerry,
I was wondering the ammo I have is:

Mr. Hollowpoint 280g hp 415 hp
NSA 350hp
Seneca 250hp
What would you recommend at 100 yards for a tight group?

Try the Mr. H.P. 255gr slugs at 3,600psi. These are giving me three shot groups that average 1,015fps with an extreme spread under 5fps. After properly tuning to the .510/255gr HP, you should consistently get 3 shot groups that are a little under 2", even at night! These slugs will group very well at 100 without wasting air.

 

[Gerry52]

Thanx Gerry,
I was wondering the ammo I have is:

Mr. Hollowpoint 280g hp 415 hp
NSA 350hp
Seneca 250hp
What would you recommend at 100 yards for a tight group?

Can't recommend any as I don't own slug shooters & have relatively zero experience with them.

 

[Dave_lee]

Well Give us an update Did anything work for you ?