Anyone out there make a coated bullet suitable for Supersonic 300 BLK loads besides the 110 Gr Carbine bullet? I see the ones for Subsonic. I guess I should finally get around to trying Subsonic in 300 BLK, but in the meantime....
Thanks
Thanks
Coated bullets for 300 BLK
- Thread starter Walkalong
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ny32182
Member
I know some USPSA open shooters that have recently started shooting (some) coated bullets at around 1400fps, but I think that is beyond the limit of what was considered possible just a short time ago, and I would think a big jump to 1800-2k fps would be frowned on...
But I've only ever shot them at ~900 fps, so not speaking from experience.
But I've only ever shot them at ~900 fps, so not speaking from experience.
http://www.doodieproject.com/index.php?/topic/4327-300-blackedout/page-3
Not a believer?
Woops, wrong link
http://www.300blktalk.com/forum/viewtopic.php?t=93810&start=20
Not a believer?
Woops, wrong link
http://www.300blktalk.com/forum/viewtopic.php?t=93810&start=20
Last edited:
ArchAngelCD
Member.
The Missouri Bullet Company has a 215gr and 245gr costed bullet specifically designed for the 300 Blackout.
http://missouribullet.com/results.php?pageNum_rsCWResults=2&category=6
http://missouribullet.com/results.php?pageNum_rsCWResults=2&category=6
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I never could get FMJ carbine bullets to function in my two AR based 300 blk so I doubt that cast would work. Do you have a bolt gun or are you using an AR? I powder coat the Lee 155 grain bullets using a gas check., loaded to supersonic.
Pat Marlins makes a 30 caliber gas check die set for plain base bullets. It uses thin material such as aluminum soda cans, 0.008" thick or so.
I wonder if you'd get a bit more speed if these gas checks were seated on a coated bullet, either home made or commercially available.
(Note, I'm experimenting with the 38 cal plain base gas checks on coated bullets and planning to seat them with the Lee bullet sizer. I've made the gas checks and it is easy. I have not gotten to seating them yet. Too many things on the "Job Jar" list
).
I wonder if you'd get a bit more speed if these gas checks were seated on a coated bullet, either home made or commercially available.
(Note, I'm experimenting with the 38 cal plain base gas checks on coated bullets and planning to seat them with the Lee bullet sizer. I've made the gas checks and it is easy. I have not gotten to seating them yet. Too many things on the "Job Jar" list
).
ArchAngelCD
Member.
Waklalong, did you check the 215gr and 245gr bullets on the MBC site? Link in my above post.
ArchAngelCD
Member.
Didn't realize that, sorry. I must have read your OP too fast because I missed the Supersonic and only saw the Subsonic. Don't get old lol...
Will gas-checked bullets with a 18-22 BHN work?
http://moyerscastbullets.com/rifle.html
Moyers has 5 diiferent 30 cal. bullets, with the mold # listed. They only take orders by phone.
http://moyerscastbullets.com/rifle.html
Moyers has 5 diiferent 30 cal. bullets, with the mold # listed. They only take orders by phone.
mstreddy
Member
Some of the 30-30 bullets will not work well in the ARs. The nose profile is too flat and jams on feeding. I have some plated 150 gr Flat nose, that I tried in 300 black and they did not work well in either the AR platforms or the Bolt gun.
Schwing
Member
My experience with any coated bullet is that you can certainly drive them a lot hotter without experiencing leading but they do very little in the way of improving accuracy.
As ny32182 said, I also have seen some folks using coated lead bullets and pushing them up to around 1300-1400fps but accuracy seems to suffer beyond that.
I usually don't put any stock in any pressure/BHN charts. I have never found real world accuracy using those charts. I have found, however that accuracy does, indeed become elusive when exceeding the pressures found by that formula BHN*(1422*.9). By that standard, the highest pressure you could achieve with a 30BHN cast bullet would only be 38,394psi. By that time, your bullets are already brittle too so...
At one point, I tested this by working up some loads with my own cast 9mms and .44s. I loaded up some that were cast and tumbled lubed and then worked up another set of loads using the exact same bullets except they were coated instead of tumble lubed. Both 9mms and .44s had the same result. Both coated and tumbled lubed were equally accurate with each charge. The only difference was that I could push the lubed bullets harder without leading (It did nothing for accuracy).
The only way I have found to get around this is by adding gas checks which, for me, makes the cost of just buying jacketed bullets the better option.
As ny32182 said, I also have seen some folks using coated lead bullets and pushing them up to around 1300-1400fps but accuracy seems to suffer beyond that.
I usually don't put any stock in any pressure/BHN charts. I have never found real world accuracy using those charts. I have found, however that accuracy does, indeed become elusive when exceeding the pressures found by that formula BHN*(1422*.9). By that standard, the highest pressure you could achieve with a 30BHN cast bullet would only be 38,394psi. By that time, your bullets are already brittle too so...
At one point, I tested this by working up some loads with my own cast 9mms and .44s. I loaded up some that were cast and tumbled lubed and then worked up another set of loads using the exact same bullets except they were coated instead of tumble lubed. Both 9mms and .44s had the same result. Both coated and tumbled lubed were equally accurate with each charge. The only difference was that I could push the lubed bullets harder without leading (It did nothing for accuracy).
The only way I have found to get around this is by adding gas checks which, for me, makes the cost of just buying jacketed bullets the better option.
Schwing
Member
Mine were all powder coated. A buddy of mine had similar results with Hi-Tek bullet coating.
Both are pretty tough coatings too. I don't know what the Hi-Tek coated bullets do but when I toss my defective powder coated bullets into my dutch oven to melt them back down, I get these neat little hollow castings of powder coating that float to the top still shaped like bullets.
I think it has more to do with the elasticity of the coating and lead. The coating just seems to mold itself around the bullet but doesn't really offer any added hardness etc. You can kind of see this by taking powder coated bullets and smacking them a few times with a hammer or squishing them on an arbor press. The coating stays on the bullet even if you squish it out of shape.
Both are pretty tough coatings too. I don't know what the Hi-Tek coated bullets do but when I toss my defective powder coated bullets into my dutch oven to melt them back down, I get these neat little hollow castings of powder coating that float to the top still shaped like bullets.
I think it has more to do with the elasticity of the coating and lead. The coating just seems to mold itself around the bullet but doesn't really offer any added hardness etc. You can kind of see this by taking powder coated bullets and smacking them a few times with a hammer or squishing them on an arbor press. The coating stays on the bullet even if you squish it out of shape.
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