best case to push 130 jlk to 3100?

[pdd614]

I haven't found too many people shooting any 130 6.5's. Looking at putting together another 6.5, but feel like I need a significant speed advantage over my 6.5x47. I'm currently shooting the 130 jlk at 2860, and know a buddy who shot them to 3k fps with rl17 in a 260.

Do you guys think the swede will reach 3100 or will I need something bigger? Maybe a 6.5x284 or 264 win mag. I have a 14-1800 yard field that needs a rifle, and almost 2,000 jlk's sitting here.

and a quick pic of my 6.5x47 on the 1100 yard field.

or maybe I should give up on it, and build myself a 7 or 338 mag of some sort.

 

[308sako]

Re: best case to push 130 jlk to 3100?

deleted in protest!

 

[balkandom]

Re: best case to push 130 jlk to 3100?

I used to load a LOT for the .264 Winmag, a Ruger #1 with a Douglas 26. I never used 130's but with 4350 and 4831, I could push Hornady 140's past the 3k mark without a lot of difficulty. though I found that my cases didn't last too long.

 

[pdd614]

Re: best case to push 130 jlk to 3100?

308sako, no need to sell me on lapua brass. I have an addiction to the stuff. Thanks for the reply's guys.

 

[wadebrown]

Re: best case to push 130 jlk to 3100?

I push 139 Scenars to 3,050 fps with my 28-inch barreled 6.5 x 55 AI with great accuracy so I think it should do what you want.

 

[steve123]

Re: best case to push 130 jlk to 3100?

Just so you know.Ballistic coefficient is KING,"especially" for shooting at extreme distances.

What will be your enemy at extreme range is wind drift not drop.

Trying to crank the velocities up to make up for lower BC can be counter productive.You will have to study up on BC's and velocities to realize the difference.Some other negatives exist as well.One of which is poor barrel life and another is having to wait longer to shoot while your barrel cools.Not to mention excessive fouling.

It might be time to consider a 7mm with heavy bullets.Wildcat bullets is making a 200 grainer with very high BC.Or you might want to step up to .338 cal.

Steve

 

[TEAMSENDIT]

Re: best case to push 130 jlk to 3100?

I would vote for the 260ai if you really feel you need that kind of speed.

 

[pdd614]

Re: best case to push 130 jlk to 3100?

steve, I understand bc. This little 130 grainer is not exactly a slouch. I use a g7 bc of .314 along with all my other variables and it is very accurate out to 1100 yards. right on to be exact. I know boutique bullet makers can blow this out of the water, but it is still very respectable.

Entering all the data into jbm using g7 bc's from brian litz, it comes out to almost a wash. The 300smk 2750 is only a half mil better in the wind at 1800 yards, and the 180 vld at 3000 fps is a wash against the 130 jlk.

I guess that should be another topic all together, because I haven't actually shot any of these. But if a 130 jlk at 3100 fps really can be a wash against the 7 mags, and burn alot less powder, then it would be something to consider. You are right though, I don't want to blow through a barrel in less than 1000 rounds.

I have a feeling its going to take a 338 at these ranges.

 

[dar1246]

Re: best case to push 130 jlk to 3100?

I use the JLKs 130s with RL-17 in 2 of my 260s. One with a 30" barrel shooting at 3100 fps. At 800 yards come ups is 14.25 moa and my 26" barrel gettingh 2975 come ups is 15.25 moa. The 260 will do everything you need. The JLKs list a BC of .620. My 26" 260 has the same 100 yard zero with the 139s and the 130s. When shot at 800 yards. There is a 3 moa difference.
If you decide to build something in a 6.5. The 260 is the king. Everything else will trading apples for apples. Here is a video of the results between the bullets. My 2 cents

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[Casey Simpson]

Re: best case to push 130 jlk to 3100?

Briefly in a test I ran 120's 3100 with RL17, but the powder seemed unstable / sensitive to ambient temperature changes (I know you asked about 130's).
I'm betting the Swede will do it, but I'd bet the 260 will too with the right firing pin / firing pin / bolt face hole / barrel length / neck dimension combination. You might have to give an extra one-half grain of powder in cold weather?

 

[steve123]

Re: best case to push 130 jlk to 3100?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pdd614</div><div class="ubbcode-body">steve, I understand bc. This little 130 grainer is not exactly a slouch. I use a g7 bc of .314 along with all my other variables and it is very accurate out to 1100 yards. right on to be exact. I know boutique bullet makers can blow this out of the water, but it is still very respectable.

Entering all the data into jbm using g7 bc's from brian litz, it comes out to almost a wash. The 300smk 2750 is only a half mil better in the wind at 1800 yards, and the 180 vld at 3000 fps is a wash against the 130 jlk.

I guess that should be another topic all together, because I haven't actually shot any of these. But if a 130 jlk at 3100 fps really can be a wash against the 7 mags, and burn alot less powder, then it would be something to consider. You are right though, I don't want to blow through a barrel in less than 1000 rounds.

I have a feeling its going to take a 338 at these ranges. </div></div>

I reread you post and realized you have all those JLK 130's to shoot up.Sorry I should have paid attention better.

I know what you mean though.I've shot my 6x47L at 1100Y a few times and it does great also.I like those x47L's.

I know I said 180 Berger,so I can see where it would be a wash but so it would be apples to apples,I went over to JBM simplified and put in the JLK 6.5mm 130gr at 3100fps .620? G1 BC for 1800Y and it came out to 248" in a 10mph wind and then the 7mm 180 JLK at 3000fps .735 G1 BC and it gave 199" in the same wind at 1800Y.But at 1000Y the difference is only 10".

I imagine your just wanting to have fun,like me,shooting at extreme range.So I just pick a calmish day when I want to shoot at a mile.To help give you a reference,I can hit my 2' wide steel plate quite often with my 30cal and 240SMK's at 2925fps.Once the wind kicks up it's a whole different story though,time to leave then.

Steve

 

[pdd614]

Re: best case to push 130 jlk to 3100?

Steve, you are right this would be just for fun.

Just for reference purposes that 7mm 180 jlk had a measured g1 bc of .645, or .330 g7 bc. I got these numbers from Bryan Litz's book. The gap would narrow by a considerable margin if you run the numbers again using actually measured bc.

If only Brian would have measured the 130 jlk along with the 140, but I think somewhere in the .310 to .314 is where this bullet falls.

That in no way is knocking the 180 jlk. The 7mm 175 smk measured .327, and the berger 180 vld measured .337.

 

[mattmcg]

Re: best case to push 130 jlk to 3100?

I'm running a 260AI with 130gr JLKs and have pretty much topped out at 3050 with some signs of pressure. I've backed them to 3020 or so and have enjoyed outshooting the 243 Win with DTACs at 3100 out to 1K!

Beyond the 1K with this setup, I don't have any experience though. Would love to travel out and join you to see what it'll do though.

 

[steve123]

Re: best case to push 130 jlk to 3100?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pdd614</div><div class="ubbcode-body">Steve, you are right this would be just for fun.

Just for reference purposes that 7mm 180 jlk had a measured g1 bc of .645, or .330 g7 bc. I got these numbers from Bryan Litz's book. The gap would narrow by a considerable margin if you run the numbers again using actually measured bc.

If only Brian would have measured the 130 jlk along with the 140, but I think somewhere in the .310 to .314 is where this bullet falls.

That in no way is knocking the 180 jlk. The 7mm 175 smk measured .327, and the berger 180 vld measured .337. </div></div>

WOW

that's way off what JLK is stating for their BC, aye? I don't have Bryon's book.That's good info to know though.So there you have it.They are reasonably close then.I wasn't trying to be a smart ass with the reference comment.I really was trying to give you some kind of idea what to expect.

Steve

 

[pdd614]

Re: best case to push 130 jlk to 3100?

NO worries, I wasn't offended or anything. But maybe my original question doesn't seem too out of place.

 

[Jedi]

Re: best case to push 130 jlk to 3100?

bro
have been giving this great thought lately
while i shoot x47 via 28" barrel @2975fps

lapua brass is gettin crazy $$

So if when i rebarrel my match rig will be a 6.5-244 AI
or 6rem AI necked to 6.5 ck some of my post here ref 6mm crusader in 6.5
130 @ 3100fps = 56K psi
RE22 52gr long neck and low flame pressure should not be so hard on throat
Data via QL