6.5X47 Lapua... A record falls
- Thread starter Obtunded
- Start date
lejarretnoir
CGN Ultra frequent flyer
- Location
- 162km from Connaught
Very tight grouping! Just load and shoot.
Good brass, bullet, barrel and correct chamber.
Looks like the combo I was looking for.
Good brass, bullet, barrel and correct chamber.
Looks like the combo I was looking for.
shotgunjoe
CGN Regular
- Location
- winnipeg mb
Wow!
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Holy Pressures Batman!
Nice shooting for sure but....
Jerry
PS, aren't their targets bigger
Nice shooting for sure but....
Jerry
PS, aren't their targets bigger
Holy Pressures Batman!
Nice shooting for sure but....
Jerry
PS, aren't their targets bigger
Very good my mystic friend! He was shooting ISSF, which is a 50mm V (sorry...X)and a 100mm 10 ring.
Still nice shooting. I'm sorry, but as incredible as it was, I have yet to find anything that RL17 works well with, and believe me I have tried. (6BR, 6XC, 6X47 Lapua, 260, 6.5-284, and 308) I suspect he was on the high side of 60,000 for pressure too.
X Ring - 2.85"
10 Ring - 5.85"
9 Ring - 8.85"
8 Ring - 11.85"
7 Ring - 17.85"
6 Ring - 23.85"
If this is indeed the US MR 300yd Target that he was shooting on.
Pretty generous target for that range IMHO.
EDIT:
Might actually be the 1/2min X Targets.....
4. TARGETS
NOTE: F-Class Target Centers are to be used with MR-63, MR-65, MR-1 and LR targets for all F-Class
shooting. When pasted onto the above mentioned targets the scoring will be conducted as follows: the new X-rings
are valued 10-X. The old X-ring becomes the new 10-ring, the old 10-ring becomes the new 9-ring, etc.
4.4 300 Yard Target -
NRA No. MR-63FC - F-Class Target Center based on the MR-63 target for use at 300 yards. To be pasted
over the MR-63 target.
Aiming Black (inches) Rings in white (inches)
X ring . . . . . . . . . . . . 1.42
10 ring . . . . . . . . . . . . 2.85
9 ring 5.85
8 ring 8.85
7 ring . . . . . . . . . . . 11.85
6 ring . . . . . . . . . . . 17.85
5 ring . . . . . . . . . . . . 23.85
Last edited:
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Sounds like the last gen target we used to blow the X ring out of. Hey, do we get to set a new record too?
High side of 70,000psi me thinks. I have had my loads estimated at slightly over 60,000psi and I am 'two' case sizes larger and a bunch more powder
Be interesting to see what Quickload or a similar program would predict.
Jerry
It is an F-Class target, That is .5 MOA.
Are those patches or .264" holes? If those are patches, it is obviously not a .5 MOA target.
...and with his scope, he should have taken advantage of its 1/8 MOA clicks when he adjusted.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
They have to be patches. You can see the overlap in that big top left cluster.
That is a HUGE X ring
Assuming each patch is 8mm in diameter (hard to imagine it would be 7mm), it looks like a 50mm X ring.
Just like the old ISSF targets we shot in previous years at 300m.
In case newbies are looking at Cyan1de's diameters above and wondering why they are smaller then expected (1/2 min, 1min, 2 min, etc), you have to include the white line that defines the circle. These are slightly thicker then 1/8" in width (let's call it 0.150")and would be part of the higher scoring ring if broken.
So a 2.85" 10 ring IS 3" of possible target, which is pretty darn close to 1min.
Can either Cyan1de or Obtunded show the diameters of the new ICFRA (sp?) target we now shoot at 300m, 500m, 600m etc. It's itty bitty by comparison
Jerry
That is a HUGE X ring
Assuming each patch is 8mm in diameter (hard to imagine it would be 7mm), it looks like a 50mm X ring.
Just like the old ISSF targets we shot in previous years at 300m.
In case newbies are looking at Cyan1de's diameters above and wondering why they are smaller then expected (1/2 min, 1min, 2 min, etc), you have to include the white line that defines the circle. These are slightly thicker then 1/8" in width (let's call it 0.150")and would be part of the higher scoring ring if broken.
So a 2.85" 10 ring IS 3" of possible target, which is pretty darn close to 1min.
Can either Cyan1de or Obtunded show the diameters of the new ICFRA (sp?) target we now shoot at 300m, 500m, 600m etc. It's itty bitty by comparison
Jerry
Am I looking at a scope correction between the two clusters?
Do the 300 yard guys run 1/8 minute turrets?
Aside from the life safety issues of loading so hot wouldn't such a combination get extremely twitchy with mild temperature fluctuation?
I'm going to say well over 70Kpsi...64Kpsi is normal (max) loading isn't it?
Do the 300 yard guys run 1/8 minute turrets?
Aside from the life safety issues of loading so hot wouldn't such a combination get extremely twitchy with mild temperature fluctuation?
I'm going to say well over 70Kpsi...64Kpsi is normal (max) loading isn't it?
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Xfan, bingo! Yes, running powders that hot can be a royal PITA to tune
SAAMI magnum pressures is pretty much maxed at 65,000psi. Most commercial ammo is loaded to 62,000psi - just in case.
Proof loads are usually 75 to 80,000psi and are fired by factories under very controlled conditions. And only a couple of shots to ensure proper functioning.
Ongoing firing at pressures this high can lead to very early metal fatigue especially in the bolt lugs.
The modern BR action is truly a thing of beauty both in function and performance BUT what is does exceedingly well is mask conventional pressure signs.
However, they are still manf from the same steels commercial actions are so the wear and tear is similar.
I would love to see some strain guage testing on many BR type loads. That would be quite a religious experience.
From an F class shooters perspective, I much prefer to use a bit more powder in a larger case at lower pressures. Way more docile to tune and little issues over the course of a match where ambient temps can swing 20C.
And you are probably right, that the two clusters was due to a scope adjustment. Even 1/8" min clicks can get pretty big way out there when you include the increased size of the group. It should only be 0.375" but it usually shows up as 1/2" per click and some days it feels like a full inch.
Jerry
SAAMI magnum pressures is pretty much maxed at 65,000psi. Most commercial ammo is loaded to 62,000psi - just in case.
Proof loads are usually 75 to 80,000psi and are fired by factories under very controlled conditions. And only a couple of shots to ensure proper functioning.
Ongoing firing at pressures this high can lead to very early metal fatigue especially in the bolt lugs.
The modern BR action is truly a thing of beauty both in function and performance BUT what is does exceedingly well is mask conventional pressure signs.
However, they are still manf from the same steels commercial actions are so the wear and tear is similar.
I would love to see some strain guage testing on many BR type loads. That would be quite a religious experience.
From an F class shooters perspective, I much prefer to use a bit more powder in a larger case at lower pressures. Way more docile to tune and little issues over the course of a match where ambient temps can swing 20C.
And you are probably right, that the two clusters was due to a scope adjustment. Even 1/8" min clicks can get pretty big way out there when you include the increased size of the group. It should only be 0.375" but it usually shows up as 1/2" per click and some days it feels like a full inch.
Jerry
Very interesting article, I have tried RL17 in my 6.5-47Lapua, and have not seen much of an advantage with this compared to H4350. I have also tried 139gn lapua, 140gn and 130gn Bergers and 123gn Laupa's all of these have been with H4350.
I compared RL17 with H4350 using my favorite bullet, 123gn Lapua, both shot well with less than an inch of vertical at 300 yards with velocites a tame 2950fps. Rather than try more RL17 my next choice with be Hybrid 100V to see if I can replicate my match load with of 40.1gn H4350 and 123gn Lapua's with an COL of 2.727.
I use this rifle to shoot the precision rifle discipline at the ORA, longest distance is 800 yards. So far I have found this bullet to be excellent and I do not have much interest to go to a heavier bullet.
It is a bit hard to estimate loads for his rifle, but using reamer diagrams I found online to estimate a COL that would be consistent with his statment that he jammed the bullets to +20 thou and estimating a bbl of 29 inches I compiled the data below. If you take into account that Quickload generally overestimates pressure and underestimates velocity I would be willing to guess you could get a real world of velocity of 3000fps using 40.5gn of RL 17 and stay below the 'RedLine', but not much below, I would not want to shoot a load like that on a hot day.
Data for 3000fps RL-17
http://shootershaven.net/MarkPic/Lapua6_5x47/Lapu139gn3000fps.pdf
Data for 2900fps RL-17
http://shootershaven.net/MarkPic/Lapua6_5x47/Lapu139gn2900fps.pdf
I compared RL17 with H4350 using my favorite bullet, 123gn Lapua, both shot well with less than an inch of vertical at 300 yards with velocites a tame 2950fps. Rather than try more RL17 my next choice with be Hybrid 100V to see if I can replicate my match load with of 40.1gn H4350 and 123gn Lapua's with an COL of 2.727.
I use this rifle to shoot the precision rifle discipline at the ORA, longest distance is 800 yards. So far I have found this bullet to be excellent and I do not have much interest to go to a heavier bullet.
It is a bit hard to estimate loads for his rifle, but using reamer diagrams I found online to estimate a COL that would be consistent with his statment that he jammed the bullets to +20 thou and estimating a bbl of 29 inches I compiled the data below. If you take into account that Quickload generally overestimates pressure and underestimates velocity I would be willing to guess you could get a real world of velocity of 3000fps using 40.5gn of RL 17 and stay below the 'RedLine', but not much below, I would not want to shoot a load like that on a hot day.
Data for 3000fps RL-17
http://shootershaven.net/MarkPic/Lapua6_5x47/Lapu139gn3000fps.pdf
Data for 2900fps RL-17
http://shootershaven.net/MarkPic/Lapua6_5x47/Lapu139gn2900fps.pdf
Yeah... Here are what CANADIANS shoot at 300 METRES
The V-Bull is 35mm from outer edge to outer edge. 1.37" or .4MOA. The 5 RIng is 70mm, or .8MOA.
This is CyaN1de's 10 shot target he kept on a calm day. Factory Marlin 45-70, Leapers 6-24 Mil-dot scope
The V-Bull is 35mm from outer edge to outer edge. 1.37" or .4MOA. The 5 RIng is 70mm, or .8MOA.
This is CyaN1de's 10 shot target he kept on a calm day. Factory Marlin 45-70, Leapers 6-24 Mil-dot scope
Yeah... Here are what CANADIANS shoot at 300 METRES
This is CyaN1de's 10 shot target he kept on a calm day. Factory Marlin 45-70, Leapers 6-24 Mil-dot scope
Kreiger barrel on that 45/70 of course.
Ya know I looked at the Yanke target and though nice shooting, but whatever.
Then you pull out the real target....
I didn't realize just how bad I suck until now!
There is no way I could consistently hit that .4 MOA V bull with my heavy hardware!
Time for a 6mmbr/Barnard/2oz Jewel, and practice time to send 20,000-30,000 Bergers down range...I think I'm going to tell my wife I need a year off work!
Yeah... Here are what CANADIANS shoot at 300 METRES
The V-Bull is 35mm from outer edge to outer edge. 1.37" or .4MOA. The 5 RIng is 70mm, or .8MOA.
This is CyaN1de's 10 shot target he kept on a calm day. Factory Marlin 45-70, Leapers 6-24 Mil-dot scope
impressive, but we all know factory savages shoot .1 moa or better
