WTB 30 Herret Barrel

[ihmsa-2116]

Looking for a 10"" twist 10 3/4 " Contender barrel.

[IHMSA80x80]

See below here...tonedaddy has one for sale.

[Viperize]

I have a blue 30 Herret 10" barrel for sale. But I do not know what the twist is. How do I find out?

Al

[ihmsa-2116]

I have a blue 30 Herret 10" barrel for sale. But I do not know what the twist is. How do I find out?

Al

Well, that is a little difficult to explain but this is what one web page has on it. Keep in mind that the original twist for .30H contender barrels was 1 in 14" meaning if you look down the barrel at the rifling (and your eyesight is good) you will see on a 10 3/4" length contender barrel, the rifling does not make a complete revolution. On a 1 in 14" twist barrel, it would take 14" of barrel length in order to make one revolution. If the barrel is 10" twist, it will make almost one full revolution in a 10 3/4" length barrel because the chamber will take up some of the barrel length so it won't quite make one full revolution.

To measure the twist of a barrel, use a cleaning rod, magic marker and a tight patch.

1. Make a straight line with the magic marker the length of your cleaning rod.

2. Start the patch down the barrel, stop and mark the rod at the muzzle and a mark on the muzzle.

3. Push in the rod slowly until it has made one revolution, this is verified when the line on the rod lines up with the mark on the muzzle, then make a second mark on the rod at the muzzle.

4. The distance between marks on the rod is the rifling twist rate in your barrel.

Does your barrel have the front sight "silver soldered" onto the barrel or is it attached with screws? I'm not 100% sure but I don't think any of the older "silver soldered" barrels were made in 10" twist.

Just as a side note, the reason the early barrels were 14" twist was because the "designers" Bob Milek and Steve Herret were positive that the only bullets to shoot in the .30H were the "light" bullets" like 110gr and 125gr because they were designing a "varmint" cartridge. And of course, as soon as silhouette picked up the cartridge, everyone wanted to shoot heavier bullets. Too Late! Years later some barrels were made in 10" twist to shoot heavier bullets.

Harry

[Viperize]

It looks like I have a 14 twist on this barrel. Someone has unsoldered the front sight and threaded a newer front sight on it.

Thanks for the information on checking the twist.

I will sell it if anyone wants it.

Thanks,
Al

[Richard Pickering]

A 1:14 twist barrel should stabilize a .30 150gr bullet. How heavy did you want to go ?

[ihmsa-2116]

A 1:14 twist barrel should stabilize a .30 150gr bullet. How heavy did you want to go ?

"Should" !

A long time ago I was doing testing on a range that faced due East. This was very close to sundown. I was shooting at a steel target that was some where around 300 yards out. You could plainly see that the bullet was starting to lose stability at about 200 yards. It showed as a twinkling reflection off the base of the bullet from the sun as the bullet started to yaw. I would never have thought that a person could see that until then. I already had found out that flat base 150s stabilized better than boat tails but I had always thought the 150 flat base bullets stayed stable forever.

If you're only going to shoot at 200, the 14" twist is fine but if you want to go further, you need a faster twist. I would like to be able to shoot at least 165s out to 500 or so.

I ended up going to an MOA 30H for 500 to get around the problem but I'd still like to try a T/C.

Just more experimenting The urge to do more experimenting never seems to go away.

Harry

[Boomer]

FWIW in my own experiments a 150gr Sierra seems to stabilize fine out of my 14" 1-14 twist 30 Herrett barrel. HOWEVER step the weight up to a 165gr cast & much past 100 it starts to get crazy.
The load I had would shoot right at MOA at 100 but I was lucky to score hits on a turkey at 150. Somewhere between 100 & 150 the bullet would lose all stability & hit all over the place. I am curious as to the actual cause & location of the departure but am not willing to put any time into tracking it down. "They dont work" is good enough for me.