Slow burning powders in the 6XC

[Gina1]

it's a slow burning powder. That's what I'm trying to stay away from. 42 grains!! longer to burn, higher heat exposure. I figure that's what did me in with RL-17 and 4831. Will be using about 32 grains of 8208XBR.
Thanks for the advice, anyway. If I was only doing hunting, yes it would work. But during a match I go through about 70 rounds in 30 minutes, not to mention load development. and lots of practice shooting.

 

[Frankr]

Gina1 did you see the post on H1000 it seems I few guy's have been shooting it with longer barrel life.
I don't know what happened to your barrel for sure. But I do know for sure rapid firing,long strings 10 to 20 rounds will heat up most barrels to the place where throat erosion will happen fast. Then using a powder that can be hard on barrel's just makes it worse. You know there are short range BR shooters that shoot 6ppc's and will tell you at 1500 rounds the barrel is toast. some believe that 5-600 rounds the guilt edge accuracy is gone..I'm not one of them I had a 6BR with 1800 rounds down it that had shot a 5 shot .118 at 100 yards. But the throat was fire cracked bad and it was hard to clean.
My 6 XC I been shooting for about a year now has right at 1000 rounds down it. all RL17 some H4350 and yes I have shot it hot or hotter than I should have a few times. It seemed hard to clean recently and does not seem to be shooting as well as normal I kind of chucked it up as I havent been shooting much recently, I don't have a bore scope.but I know from experience when it starts getting hard to clean, fouling the throat, it is usually fire cracked pretty good. I shot a 1.750 group with it at 300 yards last weekend. not great but ok.but is does seem the tune is off in it. I have never really messed with tuning it too much as it allways just shot great. so I have been going to play with it some here soon. But I will try some H1000. RL26 looked like it might shoot good.

Sorry to hear about your barrel going on you.

 

[Frankr]

it's a slow burning powder. That's what I'm trying to stay away from. 42 grains!! longer to burn, higher heat exposure. I figure that's what did me in with RL-17 and 4831. Will be using about 32 grains of 8208XBR.
Thanks for the advice, anyway. If I was only doing hunting, yes it would work. But during a match I go through about 70 rounds in 30 minutes, not to mention load development. and lots of practice shooting.

Gina1 looks like the post says When Not Shooting Rapid Fire Strings with the H1000.
You may want to go to David Tubb's web site and ask him what to use for Rapid Fire.

The idea with the slow powder is it burns slower, longer down the bore not all the burn is in the throat. so it does not burn the throat up as quick..It has been said it burns slower and longer down the barrel so it is cooler in the throat. I really don't know just what I have read and other's have said. so the idea is fast powder burns fast and makes all the pressure quick, and burns up the throat.slow powder the opposite. The way I understand it. so maybe, the H4350,RL17 then the IMR8208 finished it off. I would ask the question to MR Tubb's .

 

[savagedasher]

H 4831 SC looks good to me with the 105 bullets. Larry

 

[Frankr]

H 4831 SC looks good to me with the 105 bullets. Larry

Larry are you shooting a 6XC with H4831 SC ? How Long or do you have any information on barrel Life ?

 

[savagedasher]

H 4831 SC looks good to me with the 105 bullets. Larry

Larry are you shooting a 6XC with H4831 SC ? How Long or do you have any information on barrel Life ?

Not shooting a 6 XC Just looking at OL and comparing the results I have had with my Dashers.
I want my case to be over 100% full I want the powder to be temperature stable . The Z1 and Pm close to one line on the peak of the burn curve. The powder burn should be 97% plus. 95%of the bullet speed must be 15'' if more down the barrel. For good barrel life. And still have good speed and moderate pressure. Larry

 

[Frankr]

H 4831 SC looks good to me with the 105 bullets. Larry

Larry are you shooting a 6XC with H4831 SC ? How Long or do you have any information on barrel Life ?

Not shooting a 6 XC Just looking at OL and comparing the results I have had with my Dashers.
I want my case to be over 100% full I want the powder to be temperature stable . The Z1 and Pm close to one line on the peak of the burn curve. The powder burn should be 97% plus. 95%of the bullet speed must be 15'' if more down the barrel. For good barrel life. And still have good speed and moderate pressure. Larry

Just Looking at OL you mean QL right. What does it show IMR8208 at ? as far as barrel life.. RL17 ?

 

[savagedasher]

H 4831 SC looks good to me with the 105 bullets. Larry

Larry are you shooting a 6XC with H4831 SC ? How Long or do you have any information on barrel Life ?

Not shooting a 6 XC Just looking at OL and comparing the results I have had with my Dashers.
I want my case to be over 100% full I want the powder to be temperature stable . The Z1 and Pm close to one line on the peak of the burn curve. The powder burn should be 97% plus. 95%of the bullet speed must be 15'' if more down the barrel. For good barrel life. And still have good speed and moderate pressure. Larry

Just Looking at OL you mean QL right. What does it show IMR8208 at ? as far as barrel life.. RL17 ?
[ I said reloader was junk my mistake and 8208 looked good I had the wrong case Sorry Larry

 

[SDDasher]

H 4831 SC looks good to me with the 105 bullets. Larry

I have shot H4831SC in my Dasher with the 105's successfully in local matches. Very reliable.
I had a similar situation with a Bartlein barrel in 6x47L and IMR 4350. My gunsmith said it was the worst fire cracked barrel he had ever seen. 1500 rounds. Granted the load was "warm" but not over pressure.

 

[Frankr]

[/quote]RL 17 is junk 8208 is ok with 85 to 105 bullets. Larry
[/quote]

Larry how are basing RL17 as junk? any evidence of it being junk? Or just a personal thing? I know I guy shooting it in a 6 dasher. he loves it..I seen a few group's about 1 inch at 500 yards. he claims 3,100 fps. I have shot the RL17 in my 6XC with very good results. Even though it should not be hard on barrel's due to how it works. I'm thinking it might be.

 

[savagedasher]

RL 17 is junk 8208 is ok with 85 to 105 bullets. Larry
[/quote]

Larry how are basing RL17 as junk? any evidence of it being junk? Or just a personal thing? I know I guy shooting it in a 6 dasher. he loves it..I seen a few group's about 1 inch at 500 yards. he claims 3,100 fps. I have shot the RL17 in my 6XC with very good results. Even though it should not be hard on barrel's due to how it works. I'm thinking it might be.
[/quote] What I said was my mistake wrong case both the powder should be hard on chambers 8208 is too fast burning. 17 is too fast also. Sorry for my mistake H 4350 or H4831 SC look better Larry

 

[Gina1]

I understand what most of you are saying about the slow burning powder Vs faster powder.
Just think about this for a second.
When I was using RL-17, I was using 38 grains and 39 for 4138sc. Now on my new barrel I'm using 31 grains of IMR8208XBR. That's 7 or 8 grains less of potential energy. Barrel runs cooler.
Another thing to think about.... Why does a 6br barrel last longer than a 6XC ( so I've been told).
Is it because of a lighter powder load ? Are they using faster powders (know this as a fact). Shooting the same 6mm 105 Berger bullet.
I'm watching the throat erosion, and the bullet count. Time will tell. So far I'm very happy with the results.

 

[Frankr]

Gina1 I found this read on 6XC barrel life. I think H4831 has been proven to give good barrel life in the 6XC. From what little bit I have been able to find out H1000 is doing real well..Me personally I will try to get 2,000 rounds or more. I will try some H4831,H1000 I have some of each. 1,100 rounds is a little disappointing . Might as well shoot a 6/284..I thought it was interesting how he described the barrel condition is this thread.


http://forum.accurateshooter.com/index.php?topic=1346079.0

 

[6xcshooter]

Ive been shooting h4359 and h4831sc in my 6xc's. there the best i've found for velocity + accuracy. Tried h1000 seemed to me it was slower velocity, hard to get enough in it to get it to 3050 fps. Had some good results with imr 4064 but have always come back to h4350 qnd 4831sc. tried rel 17 too found it to be on the inconsistent side , would shoot great one time then not very good the next. Shooting 105 to 108 gr bullet range in all 6xc's. 8 twist barrels. As like others here have said, i've found that slow burning powder is easier on barrels because it burns down farther in the barrel unlike fast burning powder. That is the faster the powder the shorter the flame peak temperature in the barrel (closer to the throat). Also I the think the burning curve of slow burning powder keeps pressure more consistent at least with heavier bullets. as for barrel heat i do shoot 1 of my 6.5 x 47 Lapua with a 9 twist with benchmark powder and a 95gr bullet and amazingly enough, like Gina the barrel stays cooler longer. i like it with lighter bullets it's killer. Far as barrel life had pretty good luck so far with 4350 & 4831 in my 6xc's. But thats what i've experienced other people probably got the same and different results. It just works for me.