260 powder
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Re: 260 powder
No definitive help from me.
In my relatively new 260 AI I've given H4350, RL-17, and H4831sc a go. My preference so far is the H4831sc. My, problem with it is that I can't seem to get enough powder in a case to do what needs doing.
I've tried both H4350 and RL-17. I really need to do some chrono testing with both of these side by side. So far the H4350 has done well, although like RL-17, my accuracy was lacking. My biggest concern with H4350 and especially RL-17 is load density. From this perspective H4350 has the edge. I can see me changing my tune on this at a later date. It may not be that big of a deal, but its something I think about. Last time out I was getting some pretty high ES's.
There isn't all that much load information out there for RL-17 for the 260. Its going to boil down to just loading and shooting and figuring this out for myself. I want all the bullet speed I can get, barrel be damned. But, if I can't hit the X ring it just doesn't matter.
Here in the next couple of weeks I hope I'll be able to focus on a H4350/RL-17 load.
I'll be watching this thread.
B
No definitive help from me.
In my relatively new 260 AI I've given H4350, RL-17, and H4831sc a go. My preference so far is the H4831sc. My, problem with it is that I can't seem to get enough powder in a case to do what needs doing.
I've tried both H4350 and RL-17. I really need to do some chrono testing with both of these side by side. So far the H4350 has done well, although like RL-17, my accuracy was lacking. My biggest concern with H4350 and especially RL-17 is load density. From this perspective H4350 has the edge. I can see me changing my tune on this at a later date. It may not be that big of a deal, but its something I think about. Last time out I was getting some pretty high ES's.
There isn't all that much load information out there for RL-17 for the 260. Its going to boil down to just loading and shooting and figuring this out for myself. I want all the bullet speed I can get, barrel be damned. But, if I can't hit the X ring it just doesn't matter.
Here in the next couple of weeks I hope I'll be able to focus on a H4350/RL-17 load.
I'll be watching this thread.
B
Re: 260 powder
90% of your 260 shooters will be using H4350 with the 130 and/or 140 grain bullets. I've tested H4350, R17, H4831, and even H1000. R17 gave a little more speed than H4350 with good accuracy, but it's a temp sensistive powder. H4831 shot ok and had high ES numbers. H1000 was slow and I couldn't get enough in the case to get speeds. H4350 gave the lowest ES, numbers, by far, and shot the best. If you can't get H4350 to shoot in a 260, somethings wrong with the gun.
90% of your 260 shooters will be using H4350 with the 130 and/or 140 grain bullets. I've tested H4350, R17, H4831, and even H1000. R17 gave a little more speed than H4350 with good accuracy, but it's a temp sensistive powder. H4831 shot ok and had high ES numbers. H1000 was slow and I couldn't get enough in the case to get speeds. H4350 gave the lowest ES, numbers, by far, and shot the best. If you can't get H4350 to shoot in a 260, somethings wrong with the gun.
Re: 260 powder
I do not have a 260 but a friend has informed that he got the best overall #s with H4350. I do know that H4831 is better for 243 Win with heavier bullets.
I do not have a 260 but a friend has informed that he got the best overall #s with H4350. I do know that H4831 is better for 243 Win with heavier bullets.
Re: 260 powder
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">90% of your 260 shooters will be using H4350 with the 130 and/or 140 grain bullets. I've tested H4350, R17, H4831, and even H1000. R17 gave a little more speed than H4350 with good accuracy, but it's a temp sensistive powder. H4831 shot ok and had high ES numbers. H1000 was slow and I couldn't get enough in the case to get speeds. H4350 gave the lowest ES, numbers, by far, and shot the best. If you can't get H4350 to shoot in a 260, somethings wrong with the gun. </div></div>
That is spot on....
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">90% of your 260 shooters will be using H4350 with the 130 and/or 140 grain bullets. I've tested H4350, R17, H4831, and even H1000. R17 gave a little more speed than H4350 with good accuracy, but it's a temp sensistive powder. H4831 shot ok and had high ES numbers. H1000 was slow and I couldn't get enough in the case to get speeds. H4350 gave the lowest ES, numbers, by far, and shot the best. If you can't get H4350 to shoot in a 260, somethings wrong with the gun. </div></div>
That is spot on....
Re: 260 powder
I switched over to 130gr VLD's for both .260's and never looked back.
That bullet is amazing at 3000fps.
I switched over to 130gr VLD's for both .260's and never looked back.
That bullet is amazing at 3000fps.
Re: 260 powder
Seems that 2800fps is what most strive for with the 140 range bullets. Ours is 2820fps with the Hornady 140 BTHP match. We've tried others and they shot well but these are a LOT cheaper and still make one nice lil hole at 100 when we do our part. They also shoot great at 2500fps in our 15" barrels. Some guns like other bullets better, ya might have to experiment a bit but you put 42.5gr of H4350 and a 139 - 142 bullet and it'll shoot. Slight tweaking might improve it some but it'll shoot good enough you can work on your technique and still be ringing steel at 1000 yards.
Topstrap
Seems that 2800fps is what most strive for with the 140 range bullets. Ours is 2820fps with the Hornady 140 BTHP match. We've tried others and they shot well but these are a LOT cheaper and still make one nice lil hole at 100 when we do our part. They also shoot great at 2500fps in our 15" barrels. Some guns like other bullets better, ya might have to experiment a bit but you put 42.5gr of H4350 and a 139 - 142 bullet and it'll shoot. Slight tweaking might improve it some but it'll shoot good enough you can work on your technique and still be ringing steel at 1000 yards.
Topstrap
Re: 260 powder
My experience regarding RL17 temp sensitivity. I just finished up winter/summer testing in 6XC, 260, and 308 in temps 43-96F. The result was no more than 42 fps over that temp spectrum in the 3 calibers. Two lots were used, velocity data was gathered with an Oehler 35 P, each caliber had a minimum of 15 rounds over the chrono in approximately 10 degree increments. Hardly scientific but if you consider 42 fps difference in 53 degree's sensitive don't use it.
My experience regarding RL17 temp sensitivity. I just finished up winter/summer testing in 6XC, 260, and 308 in temps 43-96F. The result was no more than 42 fps over that temp spectrum in the 3 calibers. Two lots were used, velocity data was gathered with an Oehler 35 P, each caliber had a minimum of 15 rounds over the chrono in approximately 10 degree increments. Hardly scientific but if you consider 42 fps difference in 53 degree's sensitive don't use it.
Re: 260 powder
4350 is my powder of choice for a bolt gun in 260, while RL-17 is my choice for gas guns. Remember that most 6.5 shooting heavy bullets 139-142 have remarkable improvements in both velocity and accuracy when they are running at the top of the book.4350 has given us a lot of over gas conditions shooting out of gas guns especially suppressed with loads on the hotter side while RL-17 has been much more forgiving with the semi-autos.
4350 is my powder of choice for a bolt gun in 260, while RL-17 is my choice for gas guns. Remember that most 6.5 shooting heavy bullets 139-142 have remarkable improvements in both velocity and accuracy when they are running at the top of the book.4350 has given us a lot of over gas conditions shooting out of gas guns especially suppressed with loads on the hotter side while RL-17 has been much more forgiving with the semi-autos.
Re: 260 powder
Speed above 2800 below 2850 my .02 cents. In my 26" bartlein 1-9 twist gap match chamber 43.3 H4350 7mm-08 necked down win primer 15 thou off the lands just about any brand of 140 class bullet. Ymmv barrel twist, chamber dimensions, &barrel length will all affect your velocity my conclusion came from near 0 vertical on a 600 yrd ladder test.
Speed above 2800 below 2850 my .02 cents. In my 26" bartlein 1-9 twist gap match chamber 43.3 H4350 7mm-08 necked down win primer 15 thou off the lands just about any brand of 140 class bullet. Ymmv barrel twist, chamber dimensions, &barrel length will all affect your velocity my conclusion came from near 0 vertical on a 600 yrd ladder test.
