I cant find a qualified (or consistent) answer on this one but, is there a difference between IMR4350 vs H4350 (and AA4350 for that matter). If there isn't, why are the published loads different. Thanks. If this has been rehashed in the past, sorry, but I couldn't locate any threads on it.
IMR 4350 vs H 4350
- Thread starter heydavemd
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Re: IMR 4350 vs H 4350
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: heydavemd</div><div class="ubbcode-body">I cant find a qualified (or consistent) answer on this one but, is there a difference between IMR4350 vs H4350 (and AA4350 for that matter). If there isn't, why are the published loads different. Thanks. If this has been rehashed in the past, sorry, but I couldn't locate any threads on it. </div></div>
The published loads being different should be a dead give away...they are not the same. IMR is slower I believe than H4350. But in any event they are different speeds and are not interchangeable
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: heydavemd</div><div class="ubbcode-body">I cant find a qualified (or consistent) answer on this one but, is there a difference between IMR4350 vs H4350 (and AA4350 for that matter). If there isn't, why are the published loads different. Thanks. If this has been rehashed in the past, sorry, but I couldn't locate any threads on it. </div></div>
The published loads being different should be a dead give away...they are not the same. IMR is slower I believe than H4350. But in any event they are different speeds and are not interchangeable
Re: IMR 4350 vs H 4350
Thanks. I figured the different published loads meant they were not interchangable, but when a local shop was out of IMR and tried to sell my H instead, I was leery. thanks again for confirming my suspicions.
Thanks. I figured the different published loads meant they were not interchangable, but when a local shop was out of IMR and tried to sell my H instead, I was leery. thanks again for confirming my suspicions.
Re: IMR 4350 vs H 4350
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: heydavemd</div><div class="ubbcode-body">Thanks. I figured the different published loads meant they were not interchangable, but when a local shop was out of IMR and tried to sell my H instead, I was leery. thanks again for confirming my suspicions.</div></div>
They are different but generally compatible with the same applications. So if you get H4350 you'll need to work up a new load but it should also be an appropriate powder for whatever chambering you were using IMR4350 for (similar, though not exact, densities and burn rates.)
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: heydavemd</div><div class="ubbcode-body">Thanks. I figured the different published loads meant they were not interchangable, but when a local shop was out of IMR and tried to sell my H instead, I was leery. thanks again for confirming my suspicions.</div></div>
They are different but generally compatible with the same applications. So if you get H4350 you'll need to work up a new load but it should also be an appropriate powder for whatever chambering you were using IMR4350 for (similar, though not exact, densities and burn rates.)
Re: IMR 4350 vs H 4350
The published loads being different should be a dead give away...they are not the same. IMR is slower I believe than H4350. But in any event they are different speeds and are not interchangeable.
BsChoy,
Agreed that loads are not interchangeable but, according to Hodgdon's chart, the three 4350 powders stack like this (fast to slow):
112 IMR4350
113 H4350
115 AA4350
The published loads being different should be a dead give away...they are not the same. IMR is slower I believe than H4350. But in any event they are different speeds and are not interchangeable.
BsChoy,
Agreed that loads are not interchangeable but, according to Hodgdon's chart, the three 4350 powders stack like this (fast to slow):
112 IMR4350
113 H4350
115 AA4350
Re: IMR 4350 vs H 4350
First understand I do not load max with anything. Now as to the IMR & H 4350. I've heard that there MAY BE as much as a 5% differance (according to Hodgen).
That may or may not be true. I was doing some testing in my Model 70 Featherweight in 270 winchester. Loading 50 grns of both with 150 grn Hornady bullets. I couldn't tell the differance. The average for both was 2882, at ten shots per test.
I think maybe each rifle is differant, as well as all the differant components.
It wouldn't hurt anything to take the Mim Sugested Starting Load for either and work north watching pressure and concentrating on accuracy.
First understand I do not load max with anything. Now as to the IMR & H 4350. I've heard that there MAY BE as much as a 5% differance (according to Hodgen).
That may or may not be true. I was doing some testing in my Model 70 Featherweight in 270 winchester. Loading 50 grns of both with 150 grn Hornady bullets. I couldn't tell the differance. The average for both was 2882, at ten shots per test.
I think maybe each rifle is differant, as well as all the differant components.
It wouldn't hurt anything to take the Mim Sugested Starting Load for either and work north watching pressure and concentrating on accuracy.
Re: IMR 4350 vs H 4350
Making comparisons via the Hodgden website is difficult. Some pressure data is expressed in PSI while some is CUP. They mix these even inside testing for same caliber and bullet.
I do notice that loads for 175 SMK and 300WM are close for IMR4350 and H4350 as far as charges go. Velocitys vary a bit but pressures are measured in different manners.
Making comparisons via the Hodgden website is difficult. Some pressure data is expressed in PSI while some is CUP. They mix these even inside testing for same caliber and bullet.
I do notice that loads for 175 SMK and 300WM are close for IMR4350 and H4350 as far as charges go. Velocitys vary a bit but pressures are measured in different manners.
Re: IMR 4350 vs H 4350
FWIW
H4350 has given me better [acc. and vels.] results than I4350 in both the 260 and 308 loads.
Has also been less temp. sensitive for me out here in AZ
YMMV
wes in AZ
FWIW
H4350 has given me better [acc. and vels.] results than I4350 in both the 260 and 308 loads.
Has also been less temp. sensitive for me out here in AZ
YMMV
wes in AZ
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