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Re: What powder for 20" .243?
[Re: keith5579]
#2804198
05/10/19 05:51 AM
05/10/19 05:51 AM
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Joined: Sep 2012
Posts: 18,024 North AL
AU338MAG
Old Mossy Horns
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Old Mossy Horns
Joined: Sep 2012
Posts: 18,024
North AL
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It is what it is. Don't think There's a powder which is going to give you that 100 FPS in a barrel that short. If your accuracy is good with H4350 at 2900 FPS, stick with it. Deer won't miss that 100 FPS.
Dying ain't much of a living boy...Josey Wales
Molon Labe
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Re: What powder for 20" .243?
[Re: AU338MAG]
#2804208
05/10/19 06:09 AM
05/10/19 06:09 AM
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Joined: Dec 2010
Posts: 882 Trussville, AL
keith5579
OP
6 point
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OP
6 point
Joined: Dec 2010
Posts: 882
Trussville, AL
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It is what it is. Don't think There's a powder which is going to give you that 100 FPS in a barrel that short. I considered this point, too. I'm not even sure about the accuracy since the barrel was shortened. I just ran 3 rounds over the magnetospeed to check velocity. H4350 is the only powder I've ever used in .243 so I wasn't sure if any of the other powders were faster in shorter barrels.
Last edited by keith5579; 05/10/19 06:15 AM.
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Re: What powder for 20" .243?
[Re: keith5579]
#2804733
05/10/19 06:31 PM
05/10/19 06:31 PM
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Joined: Jan 2019
Posts: 411 Kims Corner, Al.
1955Retiree
4 point
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4 point
Joined: Jan 2019
Posts: 411
Kims Corner, Al.
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It's gonna be hard to get to 3000 fps with that heavy of bullet , and that short barrel. You might lower the bullet weight and find something That would work.
Last edited by 1955Retiree; 05/10/19 06:35 PM.
It's not how much money you make, but how much you can keep.
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Re: What powder for 20" .243?
[Re: 1955Retiree]
#2804753
05/10/19 07:02 PM
05/10/19 07:02 PM
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Joined: Dec 2010
Posts: 882 Trussville, AL
keith5579
OP
6 point
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OP
6 point
Joined: Dec 2010
Posts: 882
Trussville, AL
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It's gonna be hard to get to 3000 fps with that heavy of bullet , and that short barrel. I'll be running a 5" Thunderbeast as soon as I receive the ATF blessing (check cashed 09-18-18). I'm hoping that'll add a few FPS. That's also the reason for the 20" barrel. Thanks everyone for the replies.
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Re: What powder for 20" .243?
[Re: keith5579]
#2804778
05/10/19 07:29 PM
05/10/19 07:29 PM
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Joined: Apr 2016
Posts: 1,552 Elmore County
treemydog
8 point
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8 point
Joined: Apr 2016
Posts: 1,552
Elmore County
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This barrel was getting 3175 fps at 26" with H4350. The same charge in the shortened barrel is running 2900. I was going to suggest IMR 7828, but dang... nearly 3200 ft/sec with a 105 grain pill seems to be mighty hot for a 243. I am running 107 match kings outta my 26" barrel at 3000, and I thought I was doing something. 4350 nor re22 didn't cook them quite as hot as IMR7828.... but I didn't try to compress the loads too much. And neither produced really tight groups for me at 100 yds with my rifle. My 1000 yard load is 44gr of 7828 outta peterson SRP brass. Will shoot cloverleaves at 100 yds, shoot decent groups at 1250, and is running 3000 ft/sec. Maybe I need to revisit the 4350? I think I was using IMR though, and not Hodgdon's offering. My son has a ruger american compact that I think has a 20" bbl. I have him well above 3000 with 87 gr vmax, and at 3000 with 100 grain pro hunters using IMR 4064 and H380. I have a box of 105 bergers for my long range rifle that I haven't tried yet. How sensitive are they with seating depth? I hear they can be a bear to dial in...
You gonna pull them pistols, or whistle Dixie?
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Re: What powder for 20" .243?
[Re: keith5579]
#2811643
05/20/19 07:41 PM
05/20/19 07:41 PM
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Joined: Apr 2016
Posts: 1,552 Elmore County
treemydog
8 point
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8 point
Joined: Apr 2016
Posts: 1,552
Elmore County
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I reviewed my data. The 100 gr prohunters out of my boys 20" ruger American is running 2850. Sorry for misleading you. When not planning for long range shooting I usually do not try to max out velocity. If I'm getting good accuracy any acceptable velocity to make the bullet perform is fine by me. Most of the time, though, I've found a full case typically gives me good accuracy, and by default, a decent velocity.
You gonna pull them pistols, or whistle Dixie?
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