I have recently built a 6br and have been working on loads.I've tried loads off of the charts on the cartrage spec's here and have found them to be on the hot side.I've got a good load with varget but it could be better.My question is IMR4895 and H4895 are only one position apart on the burn rate chart but there are no loads with IMR on several load charts I've checked,is there a big difference between these powdwers?I have a pound of IMR but am a little hesitant to try it with out asking questions first.I've tried N-135 with a v-max but its to hot,this was a load the seller of the barrel gave me.I'm using 30grs of varget with a 80gr berger,this has produced some .3's at 300yrds.The barrel is a 1in12 twist so the 80gr is about as heavy as I dare go,I thought someone here may have had a similar result and might share the result with me.Any help or input will be greatly appreciated!
IMR vs H 4895
- Thread starter fatalbert
- Start date
hey hey hey, they are the same.
They are the same. Sierra bullets they are the same. They said you can substitute one for the other.
zullo74
Saint Johns, Florida
My Quick Load software indicates that pressure and speed wise, it's H4895 then Varget then IMR 4895. A 31 gr. load of H4895 or Varget or a 30 gr. load of IMR 4895 with an 80 grain bullet will yield usable safe loads in 6BR with a 30 inch barrel. My load is with IMR 4895 and yields 3131 FPS at 44791 PSI chamber pressure. YMMV.
Frank Blum said:
Ok ... after all the research, and that's what you should do, to prove a point, that's I did, to prove my point here, that these powders are the same. Sierra bullet company is a VERY conservative company and there load data is below any pressures that would cause any dangerous mishap. So saying this, Hodgdon makes powder that is not as sensitive to temperture unlike IMR. I used either powder with the same load and no problems with any caliber.
This is from Sierra's Infinity Five Ballistics programmilboltnut said:
.308 Winchester/168 gr.bullet(they don't list H4895 for 6BR)
IMR-4895 41.3 max
H4895 39.9 max.
That is a difference of 1.4 grains. Not a huge difference, but enough to pay attention to. Yes, if you use 38.5 of either one you will be safe, but it still does not make the two the same.
So....whatever you say dude. Rock on!
Not the same powders.... H4895 is made in Australia by ADI Powders. Its sold as 2206H here. They sell it to Hodgdon who relabel it. Varget, H4895, H4350, H4227, H4198, Benchmark and more are made by ADI and sold as hodgdon powder. They dont sell to IMR. Dont interchange data. If you cant find a listed load for it, why not try reloadersnest, reduce by 10% and work up watching for pressure signs.
I see hotter load else where....... so sierra is anal about thier loadings... but at the same time say they ARE the same, imagine that?
They are similar in burn rate. They are definately not the same powder though no matter what Sierra data might say.
You can cautiously use H-4895 data for IMR. Similar is not "the same" though.
Only powder pair I know of that are the same is Win-760 and H-414. I think there are 1 or 2 others but not really sure.
You can cautiously use H-4895 data for IMR. Similar is not "the same" though.
Only powder pair I know of that are the same is Win-760 and H-414. I think there are 1 or 2 others but not really sure.
I stand corrected, Sierra said they are NOT the same. At one time they did tell me they are the same. But what's the difference, now they say they aren't.
I've tried the n-135 with the 75's and it's way to hot,and I also tried it with the80's same thng.I've been working with varget and 80gr bergers it seems like this is the bullet that the barrel shows the most promise with so far.I just got back from the range and it looks like 30grs is the ticket so far.I have noticed that the barrel has a tendency to cooper fowl after about 8-10 shots,I have had the same issue with sierra bullets.Does anyone have any wisdom to share on this?Am I doing something wrong? Is there something I can do to help prevent this or maybe slow it down, any help would be greatly appreciated!
History, H4895 WAS! a surplus military powder bought by Hodgden from the military. Old IMR 4895 was a canister powder made by Dupont, Dupont sold out to IMR Co., and made powders in Canada. IMR has sold out to Hodgon now. Today the powders MAY be the same. canister powders are held to closer burn rates than the bulk military or commercial powders. Canister powder lots do very from lot to lot. You should always back off if you use powder from another lot. Check lot numbers on the cans. I have found in the "H" and IMR 4895's to be close but NOT the same. I recently found changing lots of H1000 in a load I use to have about 40 f/s difference, five rounds of each on the same day (small sample). Burn rate and temperature sability are not the same. H4198 and the old IMR4198 did not used to be the same. H4350 and IMR4350 were not the same ( H4350 being an early Short Cut), who knows what the future will bring. You did good to ask about this question.
I saw that jo191145 said: "760 and H414 are the same" I dissagree, They are close but not the same, in my experience using both that are now 15 years old, I found that H414 was slower than 760 in a 338-06. I have got about 100 f/s difference. H414 was a military surpluse powder sold by Hodgon. New runs of H414 MAY be the same as 760. A side note, I heard that General Dynamics bought the powder facility at St. Marks, where Olin (Winchester) made ball powder. Another powder that has a lot of changes in it's history is H322. I heard that originally H322 was a surplus powder called IMR 8208M. H322 has over the years also been made in Scotland and Austrailia. Now there can be confusion with the old powder sold by Thunderbird powder Co. as IMR 8208M and the new powder IMR 8208 XBR. Old H322 and IMR 8208 M powders were popular for use in the 6PPC.
wapiti
If you look at Hodgens loading data site you'll notice 760 and 414 have identical min/max charges, velocitys and pressures. Exact carbon copy load data.
In other words whatever load data is found for 414 is automatically written down for 760 or vice versa.
Even for your 338-06.
If Hodgen sways they're identical I'll believe them. No idea if they've always been identical but they are now.
If you look at Hodgens loading data site you'll notice 760 and 414 have identical min/max charges, velocitys and pressures. Exact carbon copy load data.
In other words whatever load data is found for 414 is automatically written down for 760 or vice versa.
Even for your 338-06.
If Hodgen sways they're identical I'll believe them. No idea if they've always been identical but they are now.
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