7x47 lapua

[Clancy]

Who has one? Who built it?
Dies?

I want to learn everything I can before jumping in.
It happening, just wanna be educated first.

 

[RIFLE1]

I built myself one,....I use 7 BR dies to bump the shoulder and to seat.
35 grains of Varget with a SRA MK 168,.... Great Silhouette caliber.

 

[Clancy]

Where did the reamer come from?

 

[KT]

Talk with David @ Accurate Ordnance. They built one for a customer not that long ago.

KT

 

[FilippoMo]

I built myself one,....I use 7 BR dies to bump the shoulder and to seat.
35 grains of Varget with a SRA MK 168,.... Great Silhouette caliber.

What velocity do you get,if known?
Filippo

 

[GSPV]

Got my reamer from Dave Kiff at PT&G. .3156 neck. Loaded rounds after necking up measure .3095 .3100 ish. Can't remember the FB and I'm at work. I'll try to post it tonight. Whatever it is, it's pretty nice. You can do 110 gr flatbase up through 168 gr VLD at 308 mag length.

I'll shoot it this weekend and post some back. My plan is to work from the data in Jason Baney's article on here.

I'll post back with results. It's a hunting rifle, so don't expect Benchrest results.

The FL die is a Redding bushing die with the bushing "deck" drilled out to accept the larger neck. The seater was cut from a Wilson blank with my reamer.

 

[boltfluter]

Got my reamer from Dave Kiff at PT&G. .3156 neck. Loaded rounds after necking up measure .3095 .3100 ish. Can't remember the FB and I'm at work. I'll try to post it tonight. Whatever it is, it's pretty nice. You can do 110 gr flatbase up through 168 gr VLD at 308 mag length.

I'll shoot it this weekend and post some back. My plan is to work from the data in Jason Baney's article on here.



I'll post back with results. It's a hunting rifle, so don't expect Benchrest results.



The FL die is a Redding bushing die with the bushing "deck" drilled out to accept the larger neck. The seater was cut from a Wilson blank with my reamer.

Good looking rifle. What stock is that?

Thanks, Paul

www.boltfluting.com

 

[msalm]

I'm building one on a M7 action and a flyweight mullerworks barrel. I was just planning on using my 6.5X47 chamber reamer and a separate neck/throater reamer. I like that post on the 7mmBR dies as I was having a hell of a time finding someone to make me a resize die.

 

[GSPV]

Good looking rifle. What stock is that?

Thanks, Paul

www.boltfluting.com

Hi Paul, it's a Manners. I picked it up used on here.

It's a T3 action, BTW. Great factory action. Mike Ezell built the rifle for me. I think that it'll be a great little hunting and plinking rifle.

 

[GSPV]

I'm building one on a M7 action and a flyweight mullerworks barrel. I was just planning on using my 6.5X47 chamber reamer and a separate neck/throater reamer. I like that post on the 7mmBR dies as I was having a hell of a time finding someone to make me a resize die.

Just make the FL die from a Redding 6.5x47 die. Easy peasy.

 

[rangertim]

ream a 6.5x47 redding FL bushing die out ! I had one done for my 30x47

 

[msalm]

Just make the FL die from a Redding 6.5x47 die. Easy peasy.

That was my initial thought with a bushing die, but thought opening up the forward shoulder in a bushing die would leave too much of the base of the neck unsized...probably a non-issue and since I have an extra bushing die 6.5X47 I'll try that route after I get this chambered and put together. Thanks

 

[thekriebles]

http://bulletin.accurateshooter.com/?s=7x47+Lapua&submit=Search

 

[shoot4fun]

Other than the "I knew I could do it" aspect of this I have to ask why. Can the 7x47 come close to matching the 7MM08 in velocity, accuracy and ease. I guess there was a time when a "Lapua-Lover" just couldn't get along with 7MM08 but now even they have brass with the 7MM08 head stamp on it.
Sorry for being a downer here but some projects just aren't worthy.
But OK, just for argument sake, should't one be able to take a Redding S Type (FL or NK) die in 6.5x47, change the bushing out to match the 7x47 neck and have the dies they need? I've done it with 6/6.5 Creedmoor.

 

[boltfluter]

Other than the "I knew I could do it" aspect of this I have to ask why. Can the 7x47 come close to matching the 7MM08 in velocity, accuracy and ease. I guess there was a time when a "Lapua-Lover" just couldn't get along with 7MM08 but now even they have brass with the 7MM08 head stamp on it.
Sorry for being a downer here but some projects just aren't worthy.
But OK, just for argument sake, should't one be able to take a Redding S Type (FL or NK) die in 6.5x47, change the bushing out to match the 7x47 neck and have the dies they need? I've done it with 6/6.5 Creedmoor.

I would think the 7 x 47 would be a much better fit in an AI Mag if you were inclined to run one. Should be an awesome rifle built on the great Tikka action.

Regards, Paul

www.boltfluting.com

 

[GSPV]

Update: my reamer is .3156 neck, .138 freebore.

I'm running AI mags. Work great.

 

[GSPV]

Other than the "I knew I could do it" aspect of this I have to ask why. Can the 7x47 come close to matching the 7MM08 in velocity, accuracy and ease. I guess there was a time when a "Lapua-Lover" just couldn't get along with 7MM08 but now even they have brass with the 7MM08 head stamp on it.
Sorry for being a downer here but some projects just aren't worthy.
But OK, just for argument sake, should't one be able to take a Redding S Type (FL or NK) die in 6.5x47, change the bushing out to match the 7x47 neck and have the dies they need? I've done it with 6/6.5 Creedmoor.

The 7-08 is a nice cartridge. I could even get the small rifle primer using Lapua Palma brass. But, my goal was to minimize excess case capacity and to be able to run the wide range of bullets, from 110 grain flat base to 168 VLD, with the full diameter of the bullet above the shoulder/neck junction, within 10 thou of the lands, within AI mag length. Turns out to be an interesting set of criteria to try to meet.

Now, let's talk about how much trouble it is above and beyond a standard cartridge.

No matter what rifle I have, I'm going to have a custom barrel and I'm going to load my own rounds.

I like Wilson-type seaters, so all my seaters are made that way, cut with the reamer that the chamber was cut with. If you like to seat in your press, change out the 6.5mm sleeve for a 7mm sleeve in a Forster or Redding competition seater.

When I get load, say, 6 BR, I run virgin brass over a 6mm mandrel, through my FL bushing die, load and go,

When I load 7x47L, I run the virgin brass over a 7mm mandrel, through a 6.5x47L FL die with a .308/.309 bushing, load and go.

It just looks the same to me...with a cartridge that meets the criteria that I set for myself.

Now, if someone wants to be be able to buy rifles and/or ammo off the shelf, then the 7-08, 308, 243 etc, would be a better solution for them.

 

[shoot4fun]

I would think the 7 x 47 would be a much better fit in an AI Mag if you were inclined to run one. Should be an awesome rifle built on the great Tikka action.

Regards, Paul

www.boltfluting.com

My hunting 7MM08 is a Model 7 and it feeds fine. My other 7MM08 is a GAP barrel on an AIAW. The 168 grain VLDs work fine with those mags but I guess I could see potential for problems trying to get longest COAL with the less roomy AICS mags.

 

[GSPV]

Very first three down the tube. 100 yards, hunting bipod, varmint table, no load development. Works out to about .839. After adjusting the crosshairs to the group, the next shot was a pinwheel. I'm going to like this set up.

 

[GSPV]

Ok, here as promised, is some updated data.

7x47 Lapua, first loading i.e. Not fire formed, all loads with IMR 8208 XBR and Federal 205M primers.

110 grain Speer TNT. 40.0 grains. V=2988. Velocity all over the place. Needs more work. No pressure signs.

120 grain Nosler Ballistic Tip. 40.0 grains. V=2986. More consistent velocity. Has possibilities. Needs work. No pressure signs.

160 Sierra SPT BT. 39.0 grains. V=2749. Very consistent velocity. Heavier bullets showing more consistent velocity. Definite promise as a hunting load. No pressure signs.

160 Sierra TMK. 39.0 grains. V=2756. Super consistent velocity. Definite promise as a varmint match load. Need to tinker just a bit. No pressure signs. Picture below.