[Rated21R]

not to be a noob but does the 1/7 cost more? biggest diff. between 1/7 and 1/9? pros and cons? thanks in advance.

 

[ny32182]

The only difference physically is the twist rate; if I remember correctly Terra stated that the contours, interior chrome, chamber specs, etc would be identical to the 1:9's.

The 1:7 will allow you to stabilize heavy bullets (75gr+) better than the 1:9. Typically I find that the 1:9 tends to shoot slightly better with bullets I have used below 69gr.

 

[dbooksta]

Before you rush out to grab a 1/7 be sure you're willing to commit to 60gr+ ammo -- I just noticed the following on Speer's site:

Q. I'm shooting 50 grain soft points in a 223 semi-auto and the bullets are coming apart in flight. What's wrong with these bullets?

A. Nothing. Most likely, your rifle has a twist rate of 1-7 inches, intended for 62 grain military ammo. Several bullet makers compared notes and all had the same observation: muzzle velocities over 2800 ft/sec in a 7" twist will tear apart conventional 22 caliber bullets. Try our 62 grain FMJ or 70 grain semi-spitzer to keep bullets together.

 

[ny32182]

I don't think I would shoot anything lighter than 55 out of a 1:7. Especially if I also have a 1:9 available.

 

[DSM]

It depends on the bullet too. Thin skinned varmint or "match" bullets will blow apart easily for sure. We've run M193 out of our 1/7's without much troubles for years. If you bench them you'll see a little difference in accuracy of course but for punching holes, no worries.

 

[EricF517]

It would be nice to have the 1:7 so I can run some 90grVLD Bergers through it.

 

[jerad]

Before you rush out to grab a 1/7 be sure you're willing to commit to 60gr+ ammo -- I just noticed the following on Speer's site:

Q. I'm shooting 50 grain soft points in a 223 semi-auto and the bullets are coming apart in flight. What's wrong with these bullets?

A. Nothing. Most likely, your rifle has a twist rate of 1-7 inches, intended for 62 grain military ammo. Several bullet makers compared notes and all had the same observation: muzzle velocities over 2800 ft/sec in a 7" twist will tear apart conventional 22 caliber bullets. Try our 62 grain FMJ or 70 grain semi-spitzer to keep bullets together.

all my 1/7" Ar15s stabilize 55 grain ammo just fine, out of 5 rifles 1 doesn't like 45 grain ammo...

 

[MickeyC]

Hot rounds may wear a 1:7 faster but really it's about being able to stailize long bullets properly for decent accuracy.

 

[AponeF7]

I would purchase a 1:7 16" barrel. What do we have to do? Beg? How unbecoming, but if I must. :'(

 

[ormandj]

Any news on the 1:7" barrels?

To those saying 1:7 won't work for less than 60gr, there's >2500 Monarch 55gr steel cases in the recycling plant that would disagree. All from a 16" 1:7" Colt barrel, with no accuracy issues (considering iron sights, short barrel, and cheap ammunition - I see no keyholing and consistantly shoot 2-3" at 100m which is a limitation of my shooting ability with irons). That said, I do see increased accuracy (from a bench rest) when swapping to heavier loads; I like having that *option* available.

David

 

[MickeyC]

any updates on these?

 

[WatchoutforStobor]

Any updates on these?

Bump.

 

[TerraShrewsbury]

the first set have been run for minis and micros. They haven't told me when they will be available in 12"-16".

 

[Merlin]

the first set have been run for minis and micros. They haven't told me when they will be available in 12"-16".

Thanks Terra. Wish I could get one in 11.5"

 

[SSBiggun]

the first set have been run for minis and micros. They haven't told me when they will be available in 12"-16".

Like the cat that got its tail caught in the sliding door.







it won't be long now.