I would like to load down to the 2.950 fps range. My chose in powder is H1000 or US869. Barrel life is an issue. The H1000 Load uses 77.5 gr vs US869 90.3 gr for the same velocity. Does the burn rate of the H1000 trump the difference is powder charge of the US869 in terms of preserving barrel life?
28 Nosler Barrel life vs powder used and charge weight.
- Thread starter dad11345
- Start date
300WSM
Handloader
- Dec 24, 2011
- 839
- 471
This
Just one of those things you don't really know until after the fact and then it's too late.
My .02 cents is use it, enjoy it.
When time comes for a bbl you will have enough fun that a bbl replacement cost will seem negligible.
At least that's me. I really enjoy shooting so I say shoot, enjoy and go from there
300WSM
Handloader
- Dec 24, 2011
- 839
- 471
To add...how many rounds are you talking about?
DrMike
Ballistician
- Nov 8, 2006
- 36,923
- 5,113
Load so that maximum chamber pressure is kept at a reasonable level, and you will get a long life out of the rifle. If you insist on wringing out every last fps and tickle the dragon's tail, things go downhill quite a bit faster. Modern steels hold up quite well, but all steel eventually succumbs to heat and pressure. My 7RM has near 5K rounds down the pipe, and it still provides me sub-MOA. The average round count for that particular cartridge is considerable less than that, but I've been very careful not to shoot it hot or ride it hard and put it away wet.
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
Try this, load 3 of each and see which one is hotter after 3 shots, I'm betting H-1000 is hotter, more heat = higher flame temps= more throat erosion
Guy Miner
Master Loader
- Apr 6, 2006
- 17,496
- 4,684
Dr Mike, 5,000 is one heck of a lot of rounds through a 7mm Rem mag! 
I've always just shrugged my shoulders and figured I'd have to replace a barrel for the hot - rod cartridges sooner.
Prolonged strings of fire, rapid fire, not letting a barrel cool... Those things are barrel killers.
I don't know the answer to your question. I'd just shoot whichever load produces the best accuracy, and hunt with that. When the barrel starts going bad, replace it.
Your rifle cartridge is a hot rod. Enjoy it.
Guy
I've always just shrugged my shoulders and figured I'd have to replace a barrel for the hot - rod cartridges sooner.
Prolonged strings of fire, rapid fire, not letting a barrel cool... Those things are barrel killers.
I don't know the answer to your question. I'd just shoot whichever load produces the best accuracy, and hunt with that. When the barrel starts going bad, replace it.
Your rifle cartridge is a hot rod.
Enjoy it. Guy
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
I suggested you try it because that way you would be sure, I tried it with H-1000 and WC872 (another ball powder) on the suggestion of Kirby Allen.
I used 93 gr WC872 behind a 162 amax, and 80 gr. H1000 behind the same bullet in a 7mm STW the results were very obvious.
I used 93 gr WC872 behind a 162 amax, and 80 gr. H1000 behind the same bullet in a 7mm STW the results were very obvious.
DrMike
Ballistician
- Nov 8, 2006
- 36,923
- 5,113
I've got the receipts on this, Guy. Granted, I'm well past the 1500 or so rounds that I anticipated. It is no longer a 0.1 MOA rifle, but the loads I launched last summer still provided me 0.75 MOA, which is plenty good for most of the hunting I'd ever do. No doubt the throat is eroded significantly, but the old girl just keeps on ticking. If I thought I was going to live and hunt for a lot more years, I'd definitely be replacing the barrel. As it is, I'm just pleased that I'm able to witness some decent groups whenever I make it to the range.Dr Mike, 5,000 is one heck of a lot of rounds through a 7mm Rem mag!
Guy
- Thread starter
- #11
Mostly hunting but also minimal use out to 1,250 at the range.
- Thread starter
- #12
Not a primary range rifle. Just trying to get info on which powder will help save barrel life.
- Thread starter
- #13
You addressed my concern since even though it is less powder it burns hotter.
- Thread starter
- #14
Please share the results.
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
After 3 shots with H-1000, the barrel was too hot to hold, after cooling and 3 shots with WC872 the barrel was just warm, thats why I use ball powder in my big jug cartridges!
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
if your not gonna load to close to max. pressure, ball powder will burn dirtier (if thats a word)
RL338
Handloader
- Mar 23, 2017
- 2,784
- 4,379
A word of advice with US869 , it needs to run at full pressure or you will be laying a layer of blacktop in your barrel. RL-33 is another carbon maker , it’s also a very good overbore powder that needs to be ran hard.
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
because RE33 is a ball powder
869 is a ball powder. R-33 is a stick powder. The biggest problem with most ball powders is the temp sensitivity but, as has been mentioned, they tend to foul barrels too. H-1000 is one of the most temp stable slow powders out there and it burns quite clean.
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,330
- 594
wrong, look at the ingredients, if it contains nitrocellulose, it is a single base (also called extruded) powder, if it contains nitrocellulose and nitroglycerin it is a double based or "ball" powder, all RE powders are double based despite the appearance. That is unless things have changed in the last several years when I moved away from Alliant powders.
