Range Report best BC on a 260 bullet

[shootnfarmer]

Looking for some opinions please...

even including powder used, velocity, primers, etc

anything you want to include

thanks

 

[fastford]

Re: best BC on a 260 bullet

tag

 

[BOLTRIPPER]

Re: best BC on a 260 bullet

if you want to go far, 140 series boolits will get there, anything lighter and the wind will spank you
the 139's fly very well.

 

[bohem]

Re: best BC on a 260 bullet

I'm confused. You just want the best bullet in 6.5mm based solely on BC?

If that's the case I'm pretty sure you should look at the 140 JLK

If you want the flattest shooting 6.5mm round I think it's along the lines of the 6.5 WSM with a 140 JLK or the 264 Allen Mag (essentially a 6.5 WSM with some improvements) and a 140 running around 3700 fps.

It torches barrels like a cheap hooker goes through cigarettes.

 

[ArcticLight]

Re: best BC on a 260 bullet

142SMK.

 

[BOLTRIPPER]

Re: best BC on a 260 bullet

....and then there is always the search function

 

[ChadTRG42]

Re: best BC on a 260 bullet

Find a good bullet with a good BC, and see which shoots the best in your rifle. That will be your best option. Any of the 139, 140 or 142 will do well.
If you want to spend some money to get a high BC, get the 140 VLD's and buy a meplat pointing die. This will increase your BC by about 4%. I'm playing with it now. Initial testing is getting me right at 1 MOA less drop at 600 yards.

 

[shootnfarmer]

Re: best BC on a 260 bullet

BOLTRIPPER

i dont know if i'm a little slow or what the deal is but i can never get any results that i am looking for using the search...

maybe my computer doesnt like me
otherwise yeah i hear ya

 

[shootnfarmer]

Re: best BC on a 260 bullet

thats the second time ive heard of the pointing die, thought it wouldnt be worth it, but might have to look into it.

thanks everybody

 

[aqualung]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body">I'm confused.
If you want the flattest shooting 6.5mm round I think it's along the lines of the 6.5 WSM with a 140 JLK or the 264 Allen Mag (essentially a 6.5 WSM with some improvements) and a 140 running around 3700 fps.
</div></div>

I'm confused too!

Is the 6.5wsm a new factory round? Did I miss something?? Or are you talking 'bout a wildcat 7mmWSM or .300WSM necked down to 6.5?

My F-class buddy has gone 7mmSAUM, but is necking down .300SAUM and lengthening the case as it is fireformed. (It's a brass issue!)

I thought that the idea of a 6.5SAUM offered a better balanced case (Not as stupidly over-bore) than a WSM case adapted.

Thought's, comments, queries?

neil

 

[aqualung]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: work2shoot</div><div class="ubbcode-body">BOLTRIPPER

i dont know if i'm a little slow or what the deal is but i can never get any results that i am looking for using the search...

maybe my computer doesnt like me
otherwise yeah i hear ya </div></div>

Boltripper is a top bloke, listen to what he says. He is mellowing in his old age. He wasn't NEAR so kind when I first posted!

Try these, they <span style="font-style: italic">may</span> help.

Neil

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1460687#Post1460687

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=348731#Post348731

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1243572#Post1243572

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=754781#Post754781

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=753138#Post753138

Man, I've copy n pasted these links so often, can someone tell me how to make a sticky??

Neil

 

[42769vette]

Re: best BC on a 260 bullet

i use a 142 smk over n-150 powder. i dont know if its the best bc bullet but id say its close. i know im not switching unless someone comes out with some bc over .7 then i might give it a shot

 

[bohem]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Paduan Learner</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body">I'm confused.
If you want the flattest shooting 6.5mm round I think it's along the lines of the 6.5 WSM with a 140 JLK or the 264 Allen Mag (essentially a 6.5 WSM with some improvements) and a 140 running around 3700 fps.
</div></div>

I'm confused too!

Is the 6.5wsm a new factory round? Did I miss something?? Or are you talking 'bout a wildcat 7mmWSM or .300WSM necked down to 6.5?

My F-class buddy has gone 7mmSAUM, but is necking down .300SAUM and lengthening the case as it is fireformed. (It's a brass issue!)

I thought that the idea of a 6.5SAUM offered a better balanced case (Not as stupidly over-bore) than a WSM case adapted.

Thought's, comments, queries?

neil </div></div>

It's a wildcat. I'd make it from 270 WSM brass since it's the closest bullet size, easiest to neck size, and it has a longer neck than the 7 WSM so the barrel life will improve, even if ever so slightly.

The 6.5-7SAUM sounds like a pretty solid performer too. I have a 7 SAUM on the way right now.

The 7mm bullets have better BCs than the 6.5's do, just FYI. The extra recoil, powder, and slight increase in expense might stop you from it. The barrel lives are significantly better though.

 

[427Cobra]

Re: best BC on a 260 bullet

Lets make make easy for the FNG!

139Scenar or 142SMK
Rem Brass
CCI 200 or BR2 primer
41-43 grains of H4350
COAL 2.8-2.86

 

[RobertB]

Re: best BC on a 260 bullet

What cartridge are you shooting?

 

[Triggerhappy]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">Lets make make easy for the FNG!

139Scenar or 142SMK
Rem Brass
CCI 200 or BR2 primer
41-43 grains of H4350
COAL 2.8-2.86

</div></div>

Looks like my favorite 260 load.

 

[pd721el]

Re: best BC on a 260 bullet

Here you go, as correct as I could come up with from the webpages.
NOSLER BC SD
130 accu 0.488 0.266
140 accu 0.509 0.287
100 Baltip 0.35 0.205
120Baltip 0.458 0.246
140 match 0.529 0.287
100 Part 0.326 0.205
125 Part 0.449 0.246
140 Part 0.49 0.287

SIERRA
85 HP 0.27 0.174
100 HP 0.259 0.205
107 SMK 0.43 0.219
120 SMK 0.421 0.246
123 SMK 0.51 0.252
140 SMK 0.535 0.287
142 SMK 0.58 0.291
120 GK 0.356 0.246
140 GK 0.495 0.287

BERGER
130 VLD 0.552 0.282
140 VLD 0.612 0.313
100 MATCH 0.377 0.193
120 MATCH 0.453 0.232
140 MATCH 0.559 0.286
140 LR MATCH 0.592 0.303
HORNADY
95 VMAX 0.365 0.195
100 SP 0.358 0.205
120AMAX 0.465 0.246
129 SST 0.485 0.264
129 SP 0.445 0.264
129 IB 0.445 0.264
140 SST 0.52 0.287
140 AMAX 0.55 0.287
140SP 0.465 0.287

JLK
130 VLD 0.513 0.21
140 VLD 0.513 0.21

LAPUA
100 SCENAR 0.444
108 SCENAR 0.478
123 SCENAR 0.547
139 SCENAR 0.615

SPEER
120 HOTCORE 0.433 0.246
140 HOTCORE 0.496 0.287
90 TNT HP 0.281 0.184

CLINCH RIVER
140 0.6
147

NORMA
100 HP
156 ORYX
130 MATCH

 

[Greg Langelius *]

Re: best BC on a 260 bullet

I've used 139 Scenars, 140 A-Max, and 142SMKs. They all have personalities, and BC is only a part of the true story. As loads go, I've found that the A-Max and SMK work with essentially the same loads. For some reason, the 139 Scenars generated somewhat more pressures for the same loads as the others; and I decided they were maybe more trouble than they were worth, and they were not as easy to acquire in my area. I settled on the 142's as the best bullet for my particular purposes, which were mostly 1000yd F Class work and the like.

Greg

 

[dar1246]

Re: best BC on a 260 bullet

I thought the JLK 140s was the highest BCs of .640 even according to Brain Litz

 

[shootist2004]

Re: best BC on a 260 bullet

yeah but he's no rocket scientist!

 

[hammerhead]

Re: best BC on a 260 bullet

Greg,
Have you measured your 139 Scenar diameter? Mine are 1/2T larger than Bergers and A-Maxs. - hence more pressure. My Scenar loads shoot very well but with 0.5gr less powder (4350) for the same velocity.

 

[Greg Langelius *]

Re: best BC on a 260 bullet

Have none left to measure. Not buying any more in the forseeable... I had attributed the pressure issue to bearing length, jacket thickness and hardness, but who knows...?

 

[Triggerhappy]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shootist2004</div><div class="ubbcode-body">yeah but he's no rocket scientist! </div></div>

Funny!

 

[Pat M]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 427Cobra</div><div class="ubbcode-body">Lets make make easy for the FNG!

139Scenar or 142SMK
Rem Brass
CCI 200 or BR2 primer
41-43 grains of H4350
COAL 2.8-2.86

</div></div>

2nd that.

 

[skinnypitt]

Re: best BC on a 260 bullet

I think you got the JLK 140 VLD BC wrong. It is .630 I believe...I only remember because I was looking at it today.

 

[dar1246]

Re: best BC on a 260 bullet

Skinnypitt, you are probably right. I knew the JLKs was somewhere there close. That is still the best BC bullet. Granted I shoot 139s. I wouldn't mind trying some of them.

 

[ssgp2]

Re: best BC on a 260 bullet

Buy this book and you will know...
http://www.appliedballisticsllc.com/index_files/Book.htm

 

[olympian]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pd721el</div><div class="ubbcode-body">Here you go, as correct as I could come up with from the webpages.
BC SD

BERGER
140 VLD 0.612 0.313
140 MATCH 0.559 0.286
140 LR MATCH 0.592 0.303
</div></div>

The second column in pd721el's Berger data is not sectional density; rather, it is the G7 ballistic coeffient (BC). The first column is the G1 BC.

 

[goober]

Re: best BC on a 260 bullet

the lapua 6.5 mm (6.71 mm / .264) FMJ Boat Tail FMJBT 144 has a .636bc -its not a projectile I have read much about ,has some one shot this pill

 

[BOLTRIPPER]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ch'e</div><div class="ubbcode-body">the lapua 6.5 mm (6.71 mm / .264) FMJ Boat Tail FMJBT 144 has a .636bc -its not a projectile I have read much about ,has some one shot this pill </div></div>



i have been shooting this one for several years

 

[goober]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BOLTRIPPER</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ch'e</div><div class="ubbcode-body">the lapua 6.5 mm (6.71 mm / .264) FMJ Boat Tail FMJBT 144 has a .636bc -its not a projectile I have read much about ,has some one shot this pill </div></div>



i have been shooting this one for several years </div></div>I will take that Boltripper as you think this is an excellent projectile to use .I am using 123gr lapua scenar .547bc 28inch barrel 2850fps 1000 yards 29.80 moa but am very interested to know how this 144gr projectile performs .

 

[ranger1183]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BOLTRIPPER</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ch'e</div><div class="ubbcode-body">the lapua 6.5 mm (6.71 mm / .264) FMJ Boat Tail FMJBT 144 has a .636bc -its not a projectile I have read much about ,has some one shot this pill </div></div>

i have been shooting this one for several years </div></div>

Boltripper, any info you can pass on regarding this bullet would be greatly appreciated.

 

[toddacguy]

Re: best BC on a 260 bullet

I would like to know what speed those 144 Lapua were running to get that.636 BC . I've shot about 11,000 rounds at 2775 and the BC was .555 with 2 different barrels.

 

[ssgp2]

Re: best BC on a 260 bullet

According to Brian Litz book, the 144 FMJBT has a G1 of .564, or a G7 of.289(p417)

 

[goober]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: skinnypitt</div><div class="ubbcode-body">I think you got the JLK 140 VLD BC wrong. It is .630 I believe...I only remember because I was looking at it today. </div></div>
Given this pill has such a high BC and is available to you guys States side why do you not shoot this rather than the 139 scener or 140 amax. I have sent an email to Swampworks as I want to try some out =I would also like to try out the 144 gr fmj hpbt scener although according to Bryan Litz its MEASURED BC isnt as shown -also I think it was either Lindy or Greg Langlius mentioned it showed more pressure in their rifle than the Scener or Amax -I know boltripper uses both {do you use the same load for both }? and does one show much better performance than the other --this would be good to have some feed back on .ta

 

[goober]

Re: best BC on a 260 bullet

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ch'e</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: skinnypitt</div><div class="ubbcode-body">I think you got the JLK 140 VLD BC wrong. It is .630 I believe...I only remember because I was looking at it today. </div></div>
Given this pill has such a high BC and is available to you guys States side why do you not shoot this rather than the 139 scener or 140 amax. I have sent an email to Swampworks as I want to try some out =I would also like to try out the 144 gr fmj hpbt scener although according to Bryan Litz its MEASURED BC isnt as shown -also I think it was either Lindy or Greg Langlius mentioned it showed more pressure in their rifle than the Scener or Amax -I know boltripper uses both {do you use the same load for both }? and does one show much better performance than the other --this would be good to have some feed back on .ta </div></div>I think I meant to say the scener showed more pressure signs than the sierra and amax in the above post .I cannot get JLK projectiles here as they need an exporting licence for projectiles also which is not cheap swampy from swamp works tells me -bummer!!!

 

[pdogdown]

Re: best BC on a 260 bullet

Chad,
Where is a good starting place to find a meplat trimmer? Anything in particular to watch for when buying one?

thanks for the info when I called.

Justin

 

[bohem]

Re: best BC on a 260 bullet

Midway, Grafs, Natchez, Cabelas would be good places to start for the trimmer.

 

[khronoscide]

Re: best BC on a 260 bullet

FYI, he mentioned a pointing die, not a trimmer. I'm guessing this:

http://www.whiddengunworks.net/pointingdie.html

 

[ArcticLight]

Re: best BC on a 260 bullet

142 SMK 0.58

Gotta love that!

 

[Rob01]

Re: best BC on a 260 bullet

Hornady 140 AMAX .585 listed and .584 average as listed by Mr. Litz testing.

 

[Jedi]

Re: best BC on a 260 bullet

Always thought Amax bullets were a better option than SMK,s

might even play with the 123AMAX vs 123scenar