204 Ruger AR COAL?

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TEXAS222
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Joined: Sun Oct 19, 2014 8:09 pm
.204 Ruger Guns: custom build AR 15-Rem 700 .204 VARMINT- .204 Kimber Pro Var
Location: Southeast Texas

204 Ruger AR COAL?

Post by TEXAS222 »

Hey guys. I'm new to this site, new to the AR 204, & only been shooting AR's about a year now. I just finished building a 204, Shilen 24" 1-9, Seekins upper & handguard, & Black Rain lower with Geissele trigger. I need to know what the COAL you guys start out with on new loads. I just finished loading 60 with 40 berger's & 39 blitzkings using RL10, 8208, & H4895. I used a coal of 2.255. Is this OK or should I make a change? Any help would be appreciated. JD
rbp75503
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Joined: Mon Mar 24, 2014 11:31 am
.204 Ruger Guns: Black Rain Shilen Barrel
Location: Texarkana TX

Re: 204 Ruger AR COAL?

Post by rbp75503 »

Have similar barrel and lower. I seat based on ogive of particular bullet to barrel using Hornady modified case and comparator. Here are my results for my particular barrel from my cookbook.

Seat the bullet
Seat type/weight bullet to Ogive of the rifle's chamber. Measured by Hornday OAL gauge and Comparator or Redding Instant comparator. ( 0.020"-0.040" less than rifle measured ogive)
Black Rain-Shilen 26gr Barnes HP Reload to 1.965" Ogive
Black Rain-Shilen 35gr Berger HP Reload to 1.965" Ogive
Black Rain-Shilen 32gr Hornady V-Max Reload to 1.925" Ogive
Black Rain-Shilen 40gr Hornady V-Max Reload to 1.925" Ogive
Black Rain-Shilen 32gr Sierra Blitzking Reload to 1.935" Ogive
Black Rain-Shilen 40gr Sierra Blitzking Reload to 1.935" Ogive

ASC Mag 2.316" +/- .002" OAL
OAL not to exceed 2.303" limited to fit ASC Magazines
User avatar
TEXAS222
Senior Member
Posts: 291
Joined: Sun Oct 19, 2014 8:09 pm
.204 Ruger Guns: custom build AR 15-Rem 700 .204 VARMINT- .204 Kimber Pro Var
Location: Southeast Texas

Re: 204 Ruger AR COAL?

Post by TEXAS222 »

Thank you RBP. The ASC magazines, are these the brand you use with your 204? Do they work & function well? I need to buy some 20 rounders but haven't decided which to buy yet. Thanks, JD Southeast Texas
rbp75503
New Member
Posts: 10
Joined: Mon Mar 24, 2014 11:31 am
.204 Ruger Guns: Black Rain Shilen Barrel
Location: Texarkana TX

Re: 204 Ruger AR COAL?

Post by rbp75503 »

TEJAS JD wrote:Thank you RBP. The ASC magazines, are these the brand you use with your 204? Do they work & function well? I need to buy some 20 rounders but haven't decided which to buy yet. Thanks, JD Southeast Texas

I use the ASC SS 5 round mags. They have the longest OAL that I have found and they have been trouble free. I do not have any experience with 20 round mags as I use my 204R at the bench.
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