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Post by Deleted on Jul 16, 2011 16:58:40 GMT -8
 Here is GLshooter's new 204 LBC that I just put together for him. He should have test results shortly. |
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Post by GLSHOOTER on Jul 16, 2011 19:53:00 GMT -8
Thanks for getting it put together for me Ritch. I have his feeling this is going to be one wild ride!! Once the dies get here it will be educational for all of us, I hope!!  Greg |
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Post by GLSHOOTER on Jul 20, 2011 15:08:04 GMT -8
Here is the upper shortly after the nice postal people delivered it. I put it on the lower that I built a couple years ago with the Timney trigger and ACE stock. This lower serves me well on the PD's, in matches and on the testing bench.   Ritch did a super job on putting this together for me. I sent it out last Wednesday afternoon and got it today. not bad right on seven days!! Now if the DIES get here I will be up to my ears making brass. Greg |
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Post by Deleted on Jul 24, 2011 6:16:12 GMT -8
Greg, How are you coming on the brass prep? I have been doing some myself. It would be great to hear your ideas.
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Post by falfire on Jul 24, 2011 7:54:39 GMT -8
Now that has got to be a hot ticket item there. What barrel length is ideal for that caliber? Let us know how it performs, I may just want to screw one together for a coyote rig. I think I need to research this one a little more  |
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Post by GLSHOOTER on Jul 24, 2011 10:05:20 GMT -8
Greg, How are you coming on the brass prep? I have been doing some myself. It would be great to hear your ideas. I have only been doing the basic prep of flash holes, primer pockets and chamfering. I forgot all about rounding the necks so I'll need to pick up a 6.5 mandrel. I ordered up another 150 cases and some magazines that will be here this week. Set up my neck turner and reeducated myself on how to adjust it. I'm looking at the numbers and I thought about a 0.104 neck thickness but that might be a tad to thick. Possibly 0.013 would be a better idea with a bushing of 226? I'm just treading water until the dies get here. Maybe I'll have to drive to California and get 'em myself!! Maybe they can't spell 20 PPC. Greg |
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Post by GLSHOOTER on Jul 24, 2011 10:13:56 GMT -8
Now that has got to be a hot ticket item there. What barrel length is ideal for that caliber? Let us know how it performs, I may just want to screw one together for a coyote rig. I think I need to research this one a little more I believe that a 24" tube would be the optimal way to go on this for max speed. I THINK with the poly rifling that 20" will be OK and I believe it would be fine for a predator rifle. I like 24" because I like speed. My usage is not for calling stuff so PD's and long range targets will get most of my attention. My Tactical 20 is 24" and I really like the numbers on the chrono. Greg |
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Post by GLSHOOTER on Dec 20, 2011 16:30:33 GMT -8
Just a very short update. Contrary to popular belief I HAVE been shooting this one!! O now have over 600 rounds down range and am starting to get the handle on the rifle. A pretty flat learning curve for my self until I discovered that I needed to turn my case necks a tad more. It is now starting to shoot and I hope that I can get some real definitive information posted. The velocities out of my 20" tube are running right along in the area of 3700 to 3750 with the 39/40's. Right at the velocities I am getting out of my 20 Tactical 24" and my three 204 Rugers that run 24" to 25 1/2" A 24" tube in this round would hit 3850-3900 without any problems IMHO. Brass life looks good though I stressed some of it on purpose to the point of true abuse. I found out I could get right on 4000 FPS but the cost of the shot gets pretty steep at one or two shots/case!! I have been using Hornady 6.5 brass but Ritch finally beat me down to go with some AA stuff made by Lapua. I have not shot it yet but I can say that the prier pockets on the unfired cases from AA are very much a tighter fit than the Hornady exhibits. More later but the secret is IMR 8208 XBR. Greg |
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Post by GLSHOOTER on Feb 6, 2012 11:20:11 GMT -8
OK guys, I have been shooting the 20 LBC some more the past couple of months when the wind was not blowing here in Phoenix. I left Oklahoma to avoid it and after all these years it has tracked me down!! To date I have fired right on 700 rounds.
I found that I needed to turn my case necks down further to give the bullet more release on firing. It seemed to dislike the tight squeeze as the rounds were fired. I can't put my finger on it but I can say that giving he bullet more release has cut the groups down considerably.
As reported earlier the rifle is shooting 3650 to 2750 with good brass life. I have several cases that have had five loading done on them and they are still looking good. Remember this is only a 20" tube so I am getting 204 Ruger velocities that would normally take a 24" to 25 1/2" barrel. A 24" 20 LBC would be a screamer.
Groups size on this one hovers right below MOA with the Speer 39's and the Berger 40's. The Sierra 39, which is my normal go to bullet, just don't seem to perform in this barrel. The Hornady 40's work about as well as the Sierras so I will be using the Speers when I hit the PD fields this sumer.
As mentioned earlier I picked up some of the Alexander/Lapua brass. It is thinner than the Hornady so when you neck it down it will just barely clear the neck area. This is ideal in a BR gun but in the AR, not so much. Groups that were MOA in the old Hornady several times fired turned brass suddenly became 4" size with the new stuff. Also there was a noticeable 150 FPS DROP in velocity with the new stuff. I went home and turned the necks on the AA/Lapua stuff but have not had time to shoot it.
I have been burning a ton of the IMR 8208 XBR powder over Remington 7 1/2 BR primers. The temperature variation has not been great between 90 and 60 so I am happy. I will be trying some H4895 , a Hodgdon Extreme Powder, in the near future. I also want to try some 32 grain bullets.
In that vein I have to mention that I shot some 55 grain Berger's for a fellow that wants to built a long range coyote gun. I was very surprised but the 1:10 twist STABILIZED the bullet!! Groups were about 1 1/4 but that was with absolutely no attempt to work up a load. I picked some that were very mild under the 40's and went for it. Velocities were in the area of 3375. Slow but the cases were very mild and it could obviously be bumped up a bit from what I was shooting. Moving up to a 24" tube would bring it right up to 3600 with a bit more go juice.
Lots of fun and what a pleasure to learn with!!
Greg
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Post by GLSHOOTER on Mar 7, 2012 11:09:01 GMT -8
I finally got around to crunching some groups and targets I have shot the past couple of months. I'll post more as I find them. These targets show the 55 grain Berger Varmint BT bullets that I shot for a young man that was concerned if the 1:10 would handle them as he wants a good coyote rifle in 20 caliber. My tube is only 20" so the velocities are a tad shy of what I would want for the big dogs but this load didn't seem very hot and I think it could be pushed more. The group up first was shot pretty quickly at the end of a long test day with the 6X45. I would say total time for the 10 shots was right on about 40 seconds. I just lined it up and puled the trigger. Except for one leaker this was a pretty decent target. I was only looking for stability in the bullet or I would have put a bit more effort in on the bench.  This target is one I shot the week prior to the above group.t was blowing gusts of around 30 MPH that day and I just ran out and threw the bags down for a quick test. I guess the conditions made me pay attention as I function better under pressure generally but with this as a baseline to go up against I would feel comfortable shooting this one way out there. BTW I later shot this load for velocity and it clocked in at 3343. Very respectable for the short barrel and way hotter than a basic 55 grain 223 load. Perhaps the young man has something here!! [imghttp://i269.photobucket.com/albums/jj42/GLShooter/20%20LBC/scan0023.jpg][/img] As most know the 20 calibers are not really designed to sling big hunks of lead down range and only recently has there been an much interest in it. The Wood Chuck Den with Todd Kindler at the help is pushing these as long range target rounds. I think it is a stretch and I won't be trying to do it but for anything under 500 this would seem to shoot well enough for decent groups. Who knows what 600 + would do to these little pills. I thought you all might like to see what a BHW barrel can do when challenged by something a bit outside the box. Greg |
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Post by gpsman007 on Sept 11, 2015 13:41:08 GMT -8
what are the differences between the 204lbc and the 204 ruger
does the 204lbc shoot 204 ruger ammo
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Post by GLSHOOTER on Sept 11, 2015 16:48:32 GMT -8
what are the differences between the 204lbc and the 204 ruger does the 204lbc shoot 204 ruger ammo The LBC is based on the 6.5 Grendel. The Ruger is based in the 222 Magnum. The 20X6.8 is based on the. ..6.8 The LBC and 20X6.8 out run the Ruger by 150 FPS or so. They are a but hard to make. I have to neck turn the LBC. The 20X6.8 is very close anf should be at least cleaned up. I use five bushings to step the cases down. Greg |
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Post by Deleted on Sept 11, 2015 16:48:35 GMT -8
what are the differences between the 204lbc and the 204 ruger does the 204lbc shoot 204 ruger ammo The 20 LBC is a necked down Grendel case, which is a derivative of the 7.62x39 The 204 Ruger is a necked down 222 mag case. One will not fit in the other. The 20 LBC has a .442 case head. The 204 has a .372 case head. |
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