Imr4350 vs h4350

[Sharpshooter243]

is H4350 a good substitue for IMR4350? i can't find any IMR but there is quite abit of Hodgen...I'm trying to load 105 amax's in my 243 thanks

 

[ROBSTER]

They are close H4350 burns a little slower than IMR 4350 according to hodgdons burn rate chartgun)

 

[Sharpshooter243]

i guess i'll pick some up and if it don't shoot it don't shoot... i've tried H4831sc and was lucky if i hit the card board i was shooting at...

 

[winmag]

Hornady 7th edition recomends;
38.3gr of H 4350 for 2600fps
39.7gr of H 4350 for 2700fps
41.0gr of H 4350 for 2800fps SAAMI MAX LOAD
For 105gr A-MAX .500 B.C. IN .243 Win
Hornady side note;105 A-MAX will not stabilize in a 1-10 and slower twist bbl.
I do not load for this caliber, so I have no hands on experience with these loads, but its word for word from Hornady book
(Ironicly, they have 0 load data for 105 gr A-MAX using IMR 4350) Good luck hope this helps

 

[Long Time Long Ranger]

H-4350 and IMR 4831 are real close. You can increase your load about two grains with H-4350 when subbing it for IMR 4350. It is a very good powder and I have several good loads with it in a number of rifles. Try H-414 or RE- 19 or 22 if you have any of that.

 

[Sharpshooter243]

twist rate in my gun is 1in9 1/8 so it should be ok. I'll pick some up since i'm heading to the range tomorrow gun)

My serria program i have shows an accuracy load for their 107 mk with imr4350 so that is why i am looking for that particular powder

 

[Sharpshooter243]

winmag do they give an "accuracy load"?

 

[new shooter]

I am using RL-17 in my 243 -105 amax. At 3125 fps.

 

[roninflag]

i loaded a lot of rounds with I-4350 years ago. i had good success. if i was you i would use h-4350 now. it is an "extreme powder" , or re-17 as new shooter said.

 

[winmag]

No my book doesnt give pet loads, but it does state;
''During our testing several powders performed very well, especiallyVIHT N-140, IMR 4064, and, VIHT N-160.The best groups, and uniformity were obtained from Varget.''
They also warn against light or reduced loads when using slow burning powders with long bullets, as they behave differently with light or reduced charges.And may cause unexpected high pressure.
Sorry

 

[Sharpshooter243]

What kind of charges do they recommend for Varget i have that laying around?

 

[winmag]

VHIT N-165 powder with Hornady 105gr A-MAX in .243 Win(Hornady 7th edition)

VHIT N-165, 40.3 gr=2600fps
VHIT N-165, 42.0 gr=2700fps
VHIT N-165, 43.7 gr=2800fps**SAAMI MAX LOAD**
This is the only VHIT powder listed for use with Hornady 105gr A-MAX, in .243 Win.
-----------------------------------------------------------------------------------------
Heres the RL powder charts;
RL-19, 40.7gr =2700fps
RL-19, 41.9gr =2800fps
RL-19, 43.1gr =2900fps**SAAMI MAX LOAD**
-----------------------------------------------------------------------------------------
RL-22, 40.2gr =2600fps
RL-22, 41.9gr =2700fps
RL-22, 43.5gr =2800fps**SAAMI MAX LOAD**
-----------------------------------------------------------------------------------------
The only powder I see that runs the length of the chart is WIN WMR,from 2500fps to 3000fps

 

[Sharpshooter243]

Just got back from the range. 41gr H4350 shot best but i think i might be able to tighten it up a bit by moving it out alittle had it seated in more than usual. Anyone use varget with this weight bullet or is it too fast?

 

[REDHEAD]

I'm not for sure , but seems to me -looking at the book(s) the 4350 series is better at heavy lifting than the varget. I've guys shooting 105gr in 1;9 twist but the manufacturers recommend 1:8or better? Good luck.