H4350 and IMR4350

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JohnS

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Is there much difference between the two powder's? If the reloading manual calls for 60 gr's of IMR4350 ...would there be much diffeence if I use H4350? The shop didn't have any IMR4350 so I got H4350. thanks for the help guys.:D
 
H4350 burns slower than IMR4350, but not by much. It gives a bit higher velocity with a bit higher pressure. The two powders are NOT interchangeable.
As an example, for a 90 grain .243 bullet, the starting load for H4350 is 42.0. For IMR4350 it's 39.5.
You're changing a component. You'll have to work up the load again.
 
It's not a bad thing to have loads worked up with two powders for just such emergencies. The Hodgdon site has lots of loads for both powders. Hodgdon makes 'em both.
What cartridge are you loading?
 
I'm loading for a 7mm SAUM. with 140 gr partion's and Accubonds.

Load for the Nosler BT:

140 GR. NOS BT 140 H4350 .284" 2.825" 56.0 2910 50,600 PSI 60.0 3122 63,200 PSI

Doesn't give one for the Partion or the accubond bullets.
 
Load for the bullet weight. Who made it or its construction doesn't matter. Nosler's page gives the same loads for 140 grain BT's, Partitions and Accubonds. Mind you, they don't show H4350 at all. Likely due to time and space limitations. The page only gives three powders too.
You may find the H4350 shoots a bit better, but only trying it will tell you for sure.
 
sunray said:
Load for the bullet weight. Who made it or its construction doesn't matter. Nosler's page gives the same loads for 140 grain BT's, Partitions and Accubonds. Mind you, they don't show H4350 at all. Likely due to time and space limitations. The page only gives three powders too.
You may find the H4350 shoots a bit better, but only trying it will tell you for sure.
Click to expand...

Thanks Sunray,

I'll try it and see start low and work up to the 60gr mark ...it should work just fine I figure:D I just get alittle confused when they don't list it in the reload data. ... thanks again. John
 
sunray said:
Load for the bullet weight. Who made it or its construction doesn't matter. Nosler's page gives the same loads for 140 grain BT's, Partitions and Accubonds. Mind you, they don't show H4350 at all. Likely due to time and space limitations. The page only gives three powders too.
You may find the H4350 shoots a bit better, but only trying it will tell you for sure.
Click to expand...


I must dissagree with that statement!
Had a load go from good :) to locking the bolt simply by substituing 180 Rem bronze points from 180 Horn in a .30 cal gun :runaway:

A lot of bullets are interchangable with powder charge...but some aren't!!
For safty's sake drop a couple grains & try it.
I always try to find a manual that uses the same bullet I am.

IMR & H 4350 for the most part are about 2-3 gns diff. Hodgens being the slower powder & taking the little extra. In an unknown instance I would drop 4 gns when going from H to IMR & work back up & call it an even swap in gns when going from IMR to H & work back up.
 
Well In my Nosler Manual #5 it say's 60 gr's of IMR4350 for max.

Then I looked in my Hodgdon Manual I have and it said 60 gr's max for H4350 ..... LOL! this is why I'm confused alittle ... one book says this and the other say's that ......

I'm useing the Nosler Partion 140 gr bullet and the rifle is a 7mm Remington SAUM Sendero.
 
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JohnS said:
Well In my Nosler Manual #5 it say's 60 gr's of IMR4350 for max.

Then I looked in my Hodgdon Manual I have and it said 60 gr's max for H4350 ..... LOL! this is why I'm confused alittle ... one book says this and the other say's that ......

I'm useing the Nosler Partion 140 gr bullet and the rifle is a 7mm Remington SAUM Sendero.
Click to expand...

Hodgons manuals are very conservative.
I suggest you rely on the Nosler manual & start 4-5 gns below max & work up till you reach max velocity & accuracy desired.
 
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