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Burn Rate 4350
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posted
Does IMR-4350 & H-4350 have the same burn rate?
Can load data between the two powders be interchanged?

Thank You
 
Posts: 78 | Registered: 06 January 2005Reply With Quote
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Picture of Mike_Dettorre
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They are very close. H4350 usually allows for .5 to 1 grn heavier at max loads in most moderate capacity cases with "typical" bullets weights. For example 270 Win w/140grn, 280 Rem 150 grn, & 30-06 180 grn.

That is a comaprison out of the barnes manual.


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10182 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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Picture of fredj338
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What Mike said, I have found H4359 to bit just a bit slower than IMR, so don't load H4350 using IMR data.


LIFE IS NOT A SPECTATOR'S SPORT!
 
Posts: 7752 | Location: kalif.,usa | Registered: 08 March 2001Reply With Quote
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Picture of El Deguello
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quote:
Originally posted by Elmer Fud:
Does IMR-4350 & H-4350 have the same burn rate?Not exactly!
Can load data between the two powders be interchanged?IF you use starting loads and carefully develop your load, it is probably safe.

Thank You




"Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen."
 
Posts: 4386 | Location: New Woodstock, Madison County, Central NY | Registered: 04 January 2005Reply With Quote
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My last batch of H4350 was actually faster than my I4350. Just a good testimonial that this stuff can vary from lot to lot.
 
Posts: 2002 | Location: central wi | Registered: 13 September 2002Reply With Quote
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What Kraky said.

Both powders have each been produced in at least two different factories, and of course, in numerous individual lots. Hodgdon was first produced by ICI in Scotland (if memory serves), and is now manufactured by ADI of Australia. IMR was origianally made in the U.S., and is now from a factory in Canada. Each version and each lot is "speced" to the same specifications, but there are unavoidable variations from manufacturer to manufacturer and from lot to lot.

Frankly, it's amazing that the burning rates have been maintained as closely as they have, but it's hard to make a blanket statement about the difference in the two brands. It IS true that most of the Hodgdon-branded powders tend to be just a tad slower than the same number IMR-branded powders, but not always.
 
Posts: 13280 | Location: Henly, TX, USA | Registered: 04 April 2001Reply With Quote
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Like Kraky, my last can of H4350 was as fast or faster than my I4350. Now, I've got a jug of AA4350 to sort out.

Bill
 
Posts: 128 | Location: Hensley, AR | Registered: 05 June 2003Reply With Quote
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