j8064
Garrett Co Hooligan #1
Thanks. I've seen similar data. Different powders perform differently in applications !
IMR 4227 in 300 BLK?
- Thread starter j8064
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Thanks. I've seen similar data. Different powders perform differently in applications !
- Feb 4, 2013
- 28,175
AND, "just maybe", updated data is based on more recent testing?
What a concept...
Yes, there is that. But if you have a pound of IMR 4227, how do you know if it is IMR or H formulation?
Yes, powder changes lot to lot, but typically not enough to make a safe load dangerous.
Oh, and one would think that the "experts" would get it right when a given powder is no longer made under that name, like H4227. And considering that Sierra put out data for that powder in the last year or so for .300 BLK, they could get it right.
mtlcafan79
Ultimate Member
I have been using 4227 in the 300 BO for about two years. 16.5 grains behind Hornady 150 grain bullets gives me 2 MOA from the bench. My COAL is 2.02 and feeds with no problems.
I use 2400 for numerous loads but it doesn't play well with 150gn Lead bullets at Super velocities in the 300 BO. It is fine for Sub velocities though.
Regards,
John
I use 2400 for numerous loads but it doesn't play well with 150gn Lead bullets at Super velocities in the 300 BO. It is fine for Sub velocities though.
Regards,
John
WVHunter129
Member
- Dec 9, 2014
- 1
I am new here, but not new to the 300 BLK. I built 2 rifles (AR platform) for myself and my son. My preferred bullet, for hunting whitetail, is the Nosler 150 grain ballistic tip. I have been using these bullets in my 30-06 and my 308WIN for many years. So far all I have been using powder wise is WIN296. Just recently came across a pound of IMR4227 and decided to buy it while I had a chance. So I am following this thread, even though the last post was back in August.
My rifle and my son's both has 16 inch 1:8 twist with carbine length gas systems. I haven't had any issues with cycling at all. I have shot factory Remington UMC 220 sub-sonics and been loading M80 - 147 grain FMJ's as well as some Hornady Interlock 150 grain projectiles. My OAL for both of these is 2.15 inches and I have the same OAL for the 150 Nosler ballistic tips.
So if anyone has more information please post, I would like to see others who have 300 BLK's opinion on powders and projectiles used.
My rifle and my son's both has 16 inch 1:8 twist with carbine length gas systems. I haven't had any issues with cycling at all. I have shot factory Remington UMC 220 sub-sonics and been loading M80 - 147 grain FMJ's as well as some Hornady Interlock 150 grain projectiles. My OAL for both of these is 2.15 inches and I have the same OAL for the 150 Nosler ballistic tips.
So if anyone has more information please post, I would like to see others who have 300 BLK's opinion on powders and projectiles used.
You would get more info on the 300 blackout forums but I will give you the little I know regarding 4227.
I have used 4227 with Hornady 150 gn and Sierra 150 grain FMJBT bullets and had excellent accuracy with both. I was using 16.5 grains and crimped at the cannelure. I did not run these over the Chrony as I was just punching paper and they were doing fine at 100 yards. Magpul mags never gave me a failure to feed with either load.
Most of my shooting is with powder coated Lee lead bullets. For as much as I shoot, if I had to use jacketed bullets I would declare bankruptcy.
Regards,
John
I have used 4227 with Hornady 150 gn and Sierra 150 grain FMJBT bullets and had excellent accuracy with both. I was using 16.5 grains and crimped at the cannelure. I did not run these over the Chrony as I was just punching paper and they were doing fine at 100 yards. Magpul mags never gave me a failure to feed with either load.
Most of my shooting is with powder coated Lee lead bullets. For as much as I shoot, if I had to use jacketed bullets I would declare bankruptcy.
Regards,
John
deesly1
Active Member
- Nov 16, 2011
- 412
You would get more info on the 300 blackout forums but I will give you the little I know regarding 4227.
I have used 4227 with Hornady 150 gn and Sierra 150 grain FMJBT bullets and had excellent accuracy with both. I was using 16.5 grains and crimped at the cannelure. I did not run these over the Chrony as I was just punching paper and they were doing fine at 100 yards. Magpul mags never gave me a failure to feed with either load.
Most of my shooting is with powder coated Lee lead bullets. For as much as I shoot, if I had to use jacketed bullets I would declare bankruptcy.
Regards,
John
I too have used Hornady #3037 150 grain FMJBT. I also used 16.5 Grains of IMR 4227 and crimped at the cannelure.
Bullet: #3037
Weight: 150 Gr
Type: FMJBT
Powder: IMR 4227
ChargeWeight: 16.5
Velocity: 1,785/sec
C.O.A.L.: 2.235
Primer: 7 1/2 Rem BR
This is what I have for this Cartridge. Hope it helps. Oh and I am using a 16" 1/7 twist. Yes, 1/7 twist.
I am using a 16 inch, carbine gas, 1 in 8 twist. I don't shoot subs that's why I got the 1 in 8 twist.
Regards,
John
Regards,
John
Considering the weather has not been good for my aging bones, I haven't shot much in the last two months. 
I did manage to powder coat about 500 150gn Lee bullets which I will be shooting as soon as I can stuff them into some cases. 4227 works well for me even though it probably doesn't give the highest velocities.
When the wind stops and the temps come up, I will be chronoing some of my loads.
John
I did manage to powder coat about 500 150gn Lee bullets which I will be shooting as soon as I can stuff them into some cases. 4227 works well for me even though it probably doesn't give the highest velocities.
When the wind stops and the temps come up, I will be chronoing some of my loads.
John
I loaded up some test rounds at 16.5grains this morning and noticed it almost filled up the case to the neck. I use the same powder in my m1 Carbine and the same Bullet in my Garand/1903a3 so I'm not buying anything I don't already have/use.
I don't know how accurate a good shooting 300BLK should be compared to a 223 so any comments on that would be appreciated. Should 1 MOA @ 100 yards be reasonably acheivable from the bench?
I don't know how accurate a good shooting 300BLK should be compared to a 223 so any comments on that would be appreciated. Should 1 MOA @ 100 yards be reasonably acheivable from the bench?
I have been able to get MOA accuracy using Sierra 150 gn bullets and 4227 from the bench. Most of my lead bullet loads (unweighed and unsorted) will get 2 MOA from my cobbed up 300 BO carbine with a 1 in 8 twist barrel.
John
John
I followed nearly the same formula. I shot it in my dad's 300blk. Only difference is I used CCI Small Rifle Primers. No problems with cycling.
Chrono showed very consistent readings around 1825fps for the 3 rounds I shot through the chrono. I can't report on the grouping as my dad's Lower has a 6-7lb pull so I don't know how much tighter I can get it. His upper would not fit on my lower that has the Geisselle trigger on it. I will say the grouping was no worse than the 300blk he was using up till now.
deesly1
Active Member
- Nov 16, 2011
- 412
Weber
USMC
Anyone using 4227 with subs?
If so, what was your COL?
If so, what was your COL?
Moorvogi
Firearm Advocate
- Dec 28, 2014
- 855
I looked at manufacture website and it listed 4227 for all ranges i'm intrested in (110, 150, 208). i've been on the wait list for 1680 for 3 months now... so i picked up 4227.
i bought some manufactured 300bo, honady 208gr a-max. only 2 of 20 cycled the bolt.. which was fine because i kept ALL my brass ahahah but no seriously.. only 2 actualy cycled it enough to make it pick up the next round.
16inch carbine length gas 1:8twist... looks like i'll double check manual and manufacture then check out 16.5gr for my 150 plinkin loads. if i can get 110gr and 150gr to cycle consistantly... i have not REAL intrest in 208 subsonics.
i bought some manufactured 300bo, honady 208gr a-max. only 2 of 20 cycled the bolt.. which was fine because i kept ALL my brass ahahah but no seriously.. only 2 actualy cycled it enough to make it pick up the next round.
16inch carbine length gas 1:8twist... looks like i'll double check manual and manufacture then check out 16.5gr for my 150 plinkin loads. if i can get 110gr and 150gr to cycle consistantly... i have not REAL intrest in 208 subsonics.
Subs seem to work better with pistol gas. Supers seem to do better with carbine gas. 16.5 of 4227 is what I use for my 150 gn loads. It gives less velocity than H-110 but, like you said, H-110 isn't too easy to find these days.
John
