Twist rate on xp-100

[12-34hom]

Does anyone here know the twist rate - Remington xp-100 - chambered in 221 fireball.

12-34hom - Thanks.

 

[Bud Helms]

I believe that was 1:12, in 10" an 12 " barrels, Charlie.

Where ya been?

 

[HiBC]

I do not know for sure,but I am inclined to say 1 in 14.

I had a fellow tell me his XP-100 would not hit a mattress at 100 yds.I replied I have a high degree of confidence it will shoot sub 2 MOA.He handed it to me,with a box of black and white .223 55gr ball Win ammo.
It had been rechambered.

Sure enough,the 55 gr ball went through the target sideways.

I loaded up some 52 gr Matchkings,and 10 shots at 200 yds cut a "Y" in the target about #/4 wide and 1 1/4 tall.

I realize,a short bbl is fewer RPM,but early AR-15's were 1 in 12 and they stabilize 55 gr just fine.

 

[12-34hom]

Thanks, Bud - Hi-bc - i just bought one, originally 221 - re-chambered to 223.

Was wondering if the twist rates are compatible, for shooting 40 to 55 grain weight bullets.

I'll probably have the gun rebarreled and chambered to 223 AI.

12-34hom

 

[zoomie]

Of course the real way to know is just check yourself.

 

[Relentless Pursuit]

All Fireballs are 1-14",including the XP(in all versions).

 

[Bud Helms]

Yes, after some research (and not memory), I believe Relentless Pursuit and HiBC are correct. 1:14

Nosler Reloading manual #3, shows .221 Fireball loads fired from an "XP-100 test barrel" in 1:12. However, it seems 1:14 was the twist rate for production XP-100s chambered in .221 Fireball.

 

[jrothWA]

My 2nd edition Sierra manual...

indicate a 10.5" with a 1:12 twist.

 

[Tom Matiska]

Speer #9 says 12" also

 

[Bud Helms]

Do those manuals say they used a test barrel, or production units?

 

[Relentless Pursuit]

Punching her 223AI,would be a great call.............

 

[12-34hom]

R.P., I have a benchrest rifle chambered in 6mmAI - great round.

I had a Savage striker, in 22-250, muzzel blast was fierce, sold that, always wanted a XP-100 - this won happened along, i think i'm going to turn it into a project gun.

I also like the fact that i can get premium brass chambered in 223.

12-34hom.

 

[Relentless Pursuit]

I've a S/S 700 s/a wearing a 5 contoured Shilen 1-10",chambered 6mmRem AI and fed via HS DBM in a McMillan HTG. Hate the chambering and much prefer the 243AI(greater COAL latitudes,better manners,less ES,yada,yada).

I've (9) 223AI's currently and am sorta sweet on the chambering. Your XP midgrip or rear?..............

 

[jrothWA]

Sierra states...

Test Firearm: Model "XP-100 Remington

 

[Relentless Pursuit]

XP-100 is the receiver.....................