Threads are overrated

[simo hayha]

Nice looking work for sure. What bolt you going to run.

 

[carlsbad]

PTG 2 pc coned bolt. I ream the boltway to .708 and put in a .705 bolt. The reamer then makes an easy mandrel to set the action up for truing.

 

[Danny1788]

Nice work Jerry thanks for sharing. This forum is awesome for this.

 

[hoz53]

AACK! Jerry! Dykem! I banned that stuff in my machine shop class. Seriously, Belzona would have worked.

Sounds like Dilbert

 

[hoz53]

It does have a bolt release, however.

View attachment 1113250

I need to put them in all my r700s

 

[DaveTooley]

It's not the 1 1/16- threads that are the limiting factor. It's the lug to lug surface area. Beware of lug set back with the Norma. It will happen over time.
Larger safer lugs automatically lead to larger threads.

 

[GenePoole]

Gene,
Yes it is. But that hole in the top is ugly. --Jerry

I've since built an L fixture with a notch so I can come in from the bottom and drill a blind hole.

 

[carlsbad]

It's not the 1 1/16- threads that are the limiting factor. It's the lug to lug surface area. Beware of lug set back with the Norma. It will happen over time.
Larger safer lugs automatically lead to larger threads.

the lower lug on the repeater is limiting. Thus the single shot. --Jerry

 

[carlsbad]

Gene,
I set mine up on a mandrel between a collet indexer and a dead center. One set up. Machine the slot, rotate 90 degrees and drill the hole at the right coordinates. Open the collet fixture and put the next action in place. All I have to set on the next action is clamp it in the right orientation and set the zero on the y axis. --Jerry

 

[DaveTooley]

the lower lug on the repeater is limiting. Thus the single shot. --Jerry

Wrong

 

[Dusty Stevens]

It's not the 1 1/16- threads that are the limiting factor. It's the lug to lug surface area. Beware of lug set back with the Norma. It will happen over time.
Larger safer lugs automatically lead to larger threads.

I built one lapua on a remmy. Scared me to death

 

[DaveTooley]

I've built/barreled hundreds of Lapua's with 1 1/6-16 TPI threads. Never a problem and here's why, the rest of the system (action, bolt, etc) were engineered to handle/manage the bolt thrust. Just something to think about every time you pull the trigger.

 

[GenePoole]

Gene,
I set mine up on a mandrel between a collet indexer and a dead center. One set up. Machine the slot, rotate 90 degrees and drill the hole at the right coordinates. Open the collet fixture and put the next action in place. All I have to set on the next action is clamp it in the right orientation and set the zero on the y axis. --Jerry

What a great idea. I wish I'd thought of that. It is dreadfully difficult to get an edge-finder on any datum with my fixture flipped upside down.

 

[TAJ45]

Gene, Dave, Carlsbad - you guys are smoooooth.
Kudos.

I passed on a nice Excello and lathe 2 wks back. Ten years younger and I'd be tooling up. Just not enough zip in the system to warrant starting up at 72.5 yo. You guys keep up the good work. Tom

 

[carlsbad]

I've built/barreled hundreds of Lapua's with 1 1/6-16 TPI threads. Never a problem and here's why, the rest of the system (action, bolt, etc) were engineered to handle/manage the bolt thrust. Just something to think about every time you pull the trigger.

So are you saying the Remington will handle 338LM and derivatives or not. Your posts in this thread seem to conflict with each other.

 

[Tucker65]

I'm curious about this as well. I have a 300 Norma improved build in the works using a Kelbys Atlas Tactical action.

 

[DaveTooley]

I'm saying that the bolt lugs and action lugs are the determining factor in handling bolt thrust. Remington 700's are deficient in that area for a round that diameter. Unsafe maybe not. Long term sustainability not so good. I won't build a rifle based on a .700" diameter bolt with 1 1/16 diameter tenon. Those dimensions limit lug area.

 

[DaveTooley]

I'm curious about this as well. I have a 300 Norma improved build in the works using a Kelbys Atlas Tactical action.

I don't know what, if anything, they did to the action besides enlarge the bolt face. No info on their website. They're pretty smart around there.

 

[Tucker65]

I don't know what, if anything, they did to the action besides enlarge the bolt face. No info on their website. They're pretty smart around there.

The action I have has a .750 bolt diameter and 1-1/16 tennon. It's the same action Ryan Pierce has been building them on.

 

[DaveTooley]

The .750" bolt makes a difference.