White Mountain Carbine

[OSPD312]

I recently purchased a White Mountain Carbine from a buddy, and really love the way it looks and feels... My question is, what shoots good out of this? Sabot, round ball, maxi ball? I believe it has a 1:38 twist if I am not mistaken. If anyone has any suggestions on this they would be greatly appreciated. Thanks

Jack

[Landngroove]

You did not say what caliber it is. If it is a .45, or .54 it has a 1 in 48" twist. If it is a .50, it could have either a 1 in 20" twist, or a 1 in 38" twist. Most .50's are the 1 in 20" twist. The 1 in 38" twist, were the later .50 White Mountain Carbines. If it has a QLA muzzle, it will have the 1 in 38" twist. T/C Maxi-Balls are good for the .50's. A patched round ball shoots quite well in the .54's, as does a Maxi-Ball.

[OSPD312]

Sorry for leaving out the details. Mine is .50 caliber..I am not sure what a QLA muzzle is, so you may have to hold my hand and walk me through this. Thanks for the help in advance.

Jack

[lonewolf5348]

QLA: look into the barrel from the crown and if you see a smooth cylinder (no rifle grooves) you have a QLA barrel.

[OSPD312]

O.K. mine has rifling in it does that mean its a 1:20 twist?? And if it is 1:20 whats  a good projectile for it?

[Landngroove]

Sounds like yours is the 1 in 20" twist. A 370 grain, Thompson/Center Maxi-Ball, should be a good shooter. I would start with 80 grains of FFG Goex, Black Powder, and work up in 5 grain increments, to see what is the most accurate. If yours is like mine, it likes 90 grains, as the most accurate.

[Snowshoe]

I have a friend with one, and it shoots the Lee 250g  REAL bullet very well. He also uses 60g of Pyrodex Rs and a .490 round ball for targets.

[lostid]

O.K. mine has rifling in it does that mean its a 1:20 twist?? And if it is 1:20 whats  a good projectile for it?

Ok osp312,,we must presume you know how to determine "twist rate". that's an important thing when dealing with bp guns and projectiles,,the differance between a 1:20 or 1:32,,a 1:48 or a 1: 66,,is HUGE when it becomes a choice of projectile and powder charge with these guns . a pistole or carbine or long rifle or smooth?? Alot of that matters
 Now I'm a pretty hard core roundball shooter, had me one time a, 1:28 carbine,,,,and for all the teaching my friends that have 1:32 could give me, that darn thing wouldn't shoot REAL fer "craps"!
 Good luck friend, theres a ton of info here ,some of it is really detailed ,but ya gotta know what ya got. And ya gotta know what ya want,,,

[Landngroove]

Determine Twist rate: Put a tight fitting patch on a jag and run it down the bore to the breach plug. Then put a mark on the rod at the muzzlel that lines up with the front sight. Now slowly pull the rod out, being careful to let it turn with the rifling. When it has come out 1/4 turn measure the distance from the mark to the muzzle. If it is 5" it is a 1 in 20" twist. If it is a little over 9" then it is a 1 in 38" twist. What you do is multiply the distance from the mark to the muzzle by 4 to get the twist rate.

[doegirl]

I have had good results with 275 grain Maxi-hunters and 80 grains of GOEX ffg.  My WMC is also a .50 that lacks a QLA.  Mine has a 1:38 twist barrel.

[snicker]

Mine is also a .50 with 1:38 twist and no QLA and seems to like the lighter Maxi-hunters and Maxi-balls.  Thinking about trying the 240 gr Buffalo Ball-etts.  Also have had good luck with the T/C Break-a-way sabots and a 240 gr bullet.  Would really like to get a 24" .45 cal barrel for it.  Checked with Green Mountain and they only make a 21" with a 1:28 for it.

[mspaci]

Mine is 1-38 & like 90 grains of ffg under a hornady xtp @240 grains. Can usually hold a 2 inch group with a peep sight at 75 yards. Mike