7x47 lap
- Thread starter Keithp
- Start date
shoot4fun
Gold $$ Contributor
16" barrel?
If so, I would think you could make a 7x47 work as well as a 7MM08. I have launched a fair amount of 7MM bullets and for optimal long range work I am convinced they need long barrels to be proficient. On the other hand, the 18.5" tube on my M7 7MM08 makes deer size game DRT.
If so, I would think you could make a 7x47 work as well as a 7MM08. I have launched a fair amount of 7MM bullets and for optimal long range work I am convinced they need long barrels to be proficient. On the other hand, the 18.5" tube on my M7 7MM08 makes deer size game DRT.
Grimstod
Machinist, Designer, and Shooter.
Here is some very good infor on the 7x47Lapua. Looks like a cery lromising case to me.
http://bulletin.accurateshooter.com/2015/05/7mm-6-5x47-lapua-new-mid-sized-wildcat-cartridge-tested/
http://bulletin.accurateshooter.com/2015/05/7mm-6-5x47-lapua-new-mid-sized-wildcat-cartridge-tested/
XTR
F-TR obssessed shooting junkie
I think it would be a great case, but it won't be any better than a 7-08, just different. Since Lapua started making 7-08 brass it's pretty easy to get these days too. I think on most rifles the difference in capacity would not make much difference, esp if you weren't planning to push big pills. Now if you start thinking of running anything heavier than the 140s I think you'd really miss the extra capacity for the slower powders to get the heavies up to speed.
I've never been in the "if Lapua doesn't make the brass I won't build it" group. To date I shoot mostly WW brass, but Winchester seems to have all but stopped producing reloading components so having Lapua availability is really nice. I'm coming to accept that the WW 308 brass that I have left may be the last I see for a very long time, and I'm damned glad I stocked up on WW 243 for my 6SLR when it was available.
I've never been in the "if Lapua doesn't make the brass I won't build it" group. To date I shoot mostly WW brass, but Winchester seems to have all but stopped producing reloading components so having Lapua availability is really nice. I'm coming to accept that the WW 308 brass that I have left may be the last I see for a very long time, and I'm damned glad I stocked up on WW 243 for my 6SLR when it was available.
shoot4fun
Gold $$ Contributor
Then again, you could make 7MM08 brass from 308 Palma brass and have the small primer pockets and more case capacity for the heavier bullets.The largest atraction the 47 has is the small primer pocket. I would base your coice there.
Don't see the point of a bigger case with a 16" barrel. I would do the 7x47 just to have something different.
Paul
www.boltfluting.com
Paul
www.boltfluting.com
Funny you mention this , i found lapua do the brass last night , but I am still wondering if the extras case capacity is needed with such a short tube.
XTR
F-TR obssessed shooting junkie
It is not, but it won't hurt and you will have a rifle in an off the shelf chambering. If you want something different do the 7-47L and go down the road of custom dies and making brass. If you want something that shoots and has component and reloading availability, do the 7-08.
XTR
F-TR obssessed shooting junkie
Unless you are really trying to hammer it the regular 7-08 stuff should work fine. I use WW 7-08 brass in my hunting rifle. I think the last time I took it to the range for testing it was shooting under .4MOA at 300 yards with 140s at just over 2900. That translates to under 1½ inches at 300 yards. If I miss it isn't the rifles fault. For a hunting rifle I don't see where wringing out another 50 or 100 FPS would matter to any game I might take at reasonable distances. If you want 3200FPS get a 284 or a 7 mag.
We target shooters sometimes tend to get a little obsessed with getting the last bit of performance. Palma brass is designed to give improved brass life for people running pressures that are on the edge of or in excess of SAAMI spec. If you're not shooting to 1000 yards and trying to agg one more point over the course of a 2 or 3 day event it's not really worth it.
I'd shoot what ever 7-08 brass was available. One thing to make sure of is that the neck on the reamer you choose works with the brass you choose. My reamer has a .317 neck, which is SAAMI spec. Check to be sure you don't end up with a .313 and have to turn necks.
edit: I shoot lots of 308, a 7-08, and a 6SLR (which is made from 243 brass). They all look remarkably similar so it is darned nice to have the right head stamp on your brass. Trust me, even with the correct head stamps you can get a case on the bench that doesn't belong there.
We target shooters sometimes tend to get a little obsessed with getting the last bit of performance. Palma brass is designed to give improved brass life for people running pressures that are on the edge of or in excess of SAAMI spec. If you're not shooting to 1000 yards and trying to agg one more point over the course of a 2 or 3 day event it's not really worth it.
I'd shoot what ever 7-08 brass was available. One thing to make sure of is that the neck on the reamer you choose works with the brass you choose. My reamer has a .317 neck, which is SAAMI spec. Check to be sure you don't end up with a .313 and have to turn necks.
edit: I shoot lots of 308, a 7-08, and a 6SLR (which is made from 243 brass). They all look remarkably similar so it is darned nice to have the right head stamp on your brass. Trust me, even with the correct head stamps you can get a case on the bench that doesn't belong there.
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I don't know, but think you may see better performance from the 7x47 in a short barrel like that.
I'm looking at doing the same thing for that very reason. That is to build a 7x47L with a 16" barrel.
I currently have a 20" 708 shooting 162gr amax. I cant really get much more than 2600fps from it. 2550ish is best accuracy.
When you compare that to the speeds Jason Baney was getting from his 7x47 when the barrel was at 16" shooting the 168VLD's (2590fps with 8208), it think it looks promising. They're not identical projectiles, but close enough for approximate comparisons such as these I think.
I want to be able to shot the 162gr amax's at 2500+ (2600 would be nice) from a 16" barrel. The numbers suggest the 7x47 will do this. I'm sure if I cut my 708 barrel to 16" it would drop below 2500fps with the 162gr amax's. Obviously it's theory until its proven.
I'm looking at doing the same thing for that very reason. That is to build a 7x47L with a 16" barrel.
I currently have a 20" 708 shooting 162gr amax. I cant really get much more than 2600fps from it. 2550ish is best accuracy.
When you compare that to the speeds Jason Baney was getting from his 7x47 when the barrel was at 16" shooting the 168VLD's (2590fps with 8208), it think it looks promising. They're not identical projectiles, but close enough for approximate comparisons such as these I think.
I want to be able to shot the 162gr amax's at 2500+ (2600 would be nice) from a 16" barrel. The numbers suggest the 7x47 will do this. I'm sure if I cut my 708 barrel to 16" it would drop below 2500fps with the 162gr amax's. Obviously it's theory until its proven.
I would think the shorter 7x47 case allows more room to seat longer bullets than the 7-08. Jason Baney was getting impressive results with 168's and 180's in the 7x47. I would think the 7-08 would struggle with mag length.
I'm thinking of a 18-20" hunting rifle in 7x47 using a reamer for the longer bullets. It would be a short handy rifle for everything from hogs and deer to elk. pushing 180's at 2600+ would allow for some pretty good terminal ballistics at 500+ yards and be easy to carry and maneuver in the brush.
I'm thinking of a 18-20" hunting rifle in 7x47 using a reamer for the longer bullets. It would be a short handy rifle for everything from hogs and deer to elk. pushing 180's at 2600+ would allow for some pretty good terminal ballistics at 500+ yards and be easy to carry and maneuver in the brush.
Preacher
Gold $$ Contributor
No need for custom die's just use a 6.5x47 Lapua bushing die and open the ledge the bushing sets on.
It's done ever day on lots of different calibers...
I have a 22x47, a 6x47, a 25x47 a 6.5x47, and a 6.5x47 Ackley, and thats the only one I can not use the original 6.5x47 Lapua die with..
I also plan on a JGS reamer for the 7x47 Lapua one of these days just to fill in the void 'O)
These are all short barreled XP-100 barrels from 18" to 20"..........
It's done ever day on lots of different calibers...
I have a 22x47, a 6x47, a 25x47 a 6.5x47, and a 6.5x47 Ackley, and thats the only one I can not use the original 6.5x47 Lapua die with..
I also plan on a JGS reamer for the 7x47 Lapua one of these days just to fill in the void 'O)
These are all short barreled XP-100 barrels from 18" to 20"..........
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