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IMR 4350
- Thread starter Snuby642
- Start date
IMR 4350 has been my go to powder for 270 Winchester for years. Also, it worked well 6.5 Creedmoor and 270 wsm for me.
55 grains in the 270 win with a 130 grain bullet out of a 22” barrel gets me 3050 FPS avg.
55 grains in the 270 win with a 130 grain bullet out of a 22” barrel gets me 3050 FPS avg.
4350 is too slow of a powder for the 223, 308 and 6.5G. Very good in larger capacity cases.
^^^^^ This. Also, IMR and H are slightly different. Very close, but still different. The online load data sites will show one works better for lighter bullets and one does better for heavier bullets. Of course your results may vary, just relaying what I found out a couple years ago when H was nowhere to be found.
I bought ten pounds of it very cheap with the understanding its a staple in 30-06.
Fills the case much better than other well known alternatives.
Fills the case much better than other well known alternatives.
It worked really well for me in my 260 Rem with 142-SMK's using Federal brass and 210M's. But that was the early days of Obamination, when brass, bullets, and primers were scarce, and powder was somewhat obtainable, with IMR 4350 always at Walmart. Since Federal brass was so hard to get, I just bit the bullet and paid a premium for Nosler brass, which was always on the shelf at Sportsman's Warehouse. With that brass, it preferred H4350, so that's what I stuck with.
I use IMR 4350 for my 6.5 CM loads. It's in the Hornady book. If you'd like I can post a picture of the data.
^^^ that is the exact data I am using. Trying it out in my 6.5 CM loads. Working on the start of load development for it now. Have some rounds loaded up ranging from 40.2g to 42g. Using Hornady 140 ELD. Will post up my velocities in the near future. Probably will be about a week before I can get out and get that done.
As for using it in .223 I considered that exact thing along with loading it for my .224 Valkyrie bolt action I am working on. I couldn’t find any info on .223 other than what has already been mentioned about it being too slow burning. In the Valkyrie I found a few that had tried but with poor results. Going to try CFE223 and IMR8208 XBR instead which both of those have load data for both the .223 and .224.
As for using it in .223 I considered that exact thing along with loading it for my .224 Valkyrie bolt action I am working on. I couldn’t find any info on .223 other than what has already been mentioned about it being too slow burning. In the Valkyrie I found a few that had tried but with poor results. Going to try CFE223 and IMR8208 XBR instead which both of those have load data for both the .223 and .224.
Good to know. I am hoping for great results. Going to give the 10 round ladder test that Scott Satterlee discusses. Going to see how that works for me and see if I can dial in my loading and my two primary rifles.
IMR4350 is faster burning than H4350. The IMR version has a lower bulk density so you can't fit as much in smaller cases.
Love this powder. always cheaper and eaiser to find than H powder.
have personally used in
6BR 6x47 6.5x47 6.5GWI 7-08 308 7WSM 300WM
a little larger kernal than H equiv but easy to find and burns great. nvr a problem. Internet says temp insensitive but havnt noted a prob ever. switched to VV powder for smaller cases but still have plenty of it.
GL
DT
have personally used in
6BR 6x47 6.5x47 6.5GWI 7-08 308 7WSM 300WM
a little larger kernal than H equiv but easy to find and burns great. nvr a problem. Internet says temp insensitive but havnt noted a prob ever. switched to VV powder for smaller cases but still have plenty of it.
GL
DT
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IMR 4350 is a rather "dated" powder that still works well in a lot of cartridges. Too many to name but here are a few that I use it in. 22-250, 243, 257 Roberts, 6.5-284, 270, 280, 30-06, 300 WM. There are probably lots more. Its a little slow to use in a semi-auto.
Its been around long enough that its no longer sexy but it just plain works.
Its been around long enough that its no longer sexy but it just plain works.
Pretty sure I got a box of Pre WWII 30-06 Match Ammo from Frankford Arsenal listing 4350 as the powder.
4350 WWII surplus was sold by Hodgden back when. He also sold 4831 and some others. Later supplies were labeled with the H. H4350 is not the same as 4350
CCI small rifle primers, need a little more information.
Did you use:
CCI 400
CCI 450
CCI BR4
CCI 41
I’m going to guess CCI 400, which would explain pierced primer as cup for 400s isn’t quite as tough is cups used for others.
Always keep a few pounds of it around. (Of course we use it in Brenda Lea’s .243). It can work in cases as large as .25-06 though slower powders work much better. It is a powder that has real versatility. Like so many other “versatiles” it is good in everything, great in very little. I continue to use it in our .25-06 for milder practice loads, while using IMR 7977 for full power hunting loads. Sierra 117 SBT’s and IMR 4350 give excellent accuracy in that rifle.
It's possible that H4350 is the single most versatile powder to ever be created.
Quite amazing just how many cartridges in how many component combinations it will provide worthwhile results with. 6BR, 22BR, 6BRA, 6BRX, 6Dasher, 22-250 and its AI variants, 243win and all variants, 6.5creedmoor and all variants, 308win and nearly all variants, a massive swath of short magnums and mid magnums. 280AI and a massive swath of similar cartridges.
It's quite a powder.
Quite amazing just how many cartridges in how many component combinations it will provide worthwhile results with. 6BR, 22BR, 6BRA, 6BRX, 6Dasher, 22-250 and its AI variants, 243win and all variants, 6.5creedmoor and all variants, 308win and nearly all variants, a massive swath of short magnums and mid magnums. 280AI and a massive swath of similar cartridges.
It's quite a powder.
That's a far better group than my friend with Alien Hand syndrome. He'll put 4 shots into one hole, then without warning jerk the 5th one into the stratosphere.
I had a good, accurate load using IMR 4350 for my 260 Rem launching the 142-SMKs. Fed 210M primers in Federal brass.
This if you were paying attention is the bullshit.
I do however love your dissertation on primers. I'll keep it as a reference taped to my bench sir.
All boils down to CCI 400 not being up to the job.
Loaded plenty of H4350 w/GM205M or BR4 w//o issue in 6.5x47 and 6.5 Creed small primer brass.
Been discussed a time or 3 in the past, link to a thread about differences.
www.snipershide.com
Primers are hard to find, gotta use what you have / can find.
Isn’t a brass, bullet or propellant issue, just a primer issue.
CCCI 450s or BR4, FED GM205M / GM205MAR or Rem 7 1/2, will be a non issue with piercing.
Starline is less case capacity than Hornady, not enough difference to cause pierced primer but to get same velocity, need to drop charge weight vs Hornady.
IMR 4350 has usually needed larger charge weight to get same velocity, slightly slower burning vs H4350. At least from lot #s I’ve used.
IMR4350 is a very useful powder for a lot of cartridges.
223 & 6.5 Grendel, not so much.
SAAMI chamber 308, heavy bullets and able to load longer OAL then IMR4350 is useful.
Loaded plenty of H4350 w/GM205M or BR4 w//o issue in 6.5x47 and 6.5 Creed small primer brass.
Been discussed a time or 3 in the past, link to a thread about differences.
Small rifle primers CCI 450s vs CCI 400s for a 6BR
So why do so many people use CCI 450s when it comes to the 6BR? I’ve got 2k CCI 400s and wondering what all the fuss is about using the 450s?
www.snipershide.com
Primers are hard to find, gotta use what you have / can find.
Isn’t a brass, bullet or propellant issue, just a primer issue.
CCCI 450s or BR4, FED GM205M / GM205MAR or Rem 7 1/2, will be a non issue with piercing.
Starline is less case capacity than Hornady, not enough difference to cause pierced primer but to get same velocity, need to drop charge weight vs Hornady.
IMR 4350 has usually needed larger charge weight to get same velocity, slightly slower burning vs H4350. At least from lot #s I’ve used.
IMR4350 is a very useful powder for a lot of cartridges.
223 & 6.5 Grendel, not so much.
SAAMI chamber 308, heavy bullets and able to load longer OAL then IMR4350 is useful.
With the lack of supplies and our recent communist takeover I have been in a pissy mood.
I will not deleat my post in shame nor blame drinking nor dark of nite.
Rather I will apologize for being an ass, upset with current events and having trouble cutting it the fuck loose.
My bad.
I will not deleat my post in shame nor blame drinking nor dark of nite.
Rather I will apologize for being an ass, upset with current events and having trouble cutting it the fuck loose.
My bad.
If you're trapped into using a specific powder, switching bullets will often allow you to get something workable.
Use the CCI 450. The cup is thicker and harder.
IMR 4350 makes tiny little clover leaves in my 300 Win mag with 150 grain bullets, is my go to for 30-06 and get good accuracy in my 6.5 Creedmoors. Also worked good in my 7mmRM. It may not be fancy but it works.
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Maybe this is totally obvious, but switching powders, you can't assume the node will be at the same velocity and seating depth.
A full workup would be required again.
Especially true for changing brass (i.e. blowing primer on same load)
A full workup would be required again.
Especially true for changing brass (i.e. blowing primer on same load)
Even new lot numbers of the exact same components should be confirmed through load dev.
I skim turn my case necks to get the thickness consistent. Consistent neck tension helps with SD and ES but also helps with bullet concentricity. I used to convert Lapua 308 brass to 6.5 Creedmoor before they started making it. Had reduced case capacity though.
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