KelTec RFB update
A kel tec employee game us some information on their rifles accuracy/ ballistics.
Note, his posts all come with the caveat:"The opinions expressed above are not necessarily official Kel-Tec statements.....Use at your own risk."
"The 18" and 24" sporting versions are going to be the first versions to be put in production. The 32" and 26"SS versions will still take more development time and will therefore get into production later. We want to spend more time and effort on them and make sure they are as close to perfect as possible. The lessons learned in manufacturing the sporting versions will help when putting the Target models into production.
The target models (26SS and 32) have consistently gotten under 1 inch groups at 100yds, the sporter models have been slightly over 1 inch (average)."
"We have been loading some specific loads for the 32 inch barrel RFB and we have been able to reach our goal of 2500fps muzzle velocity with a 210gr bullet (Berger 308210V), fired in a 32inch test barrel. This leads to a calculated muzzle energy of 2,915 ft-lbs.
This is lower than some of the estimates posted here, but this heavier, high Ballistic coefficient bullet (BC=0.631) allows for more energy retention at long range (1200m is the goal)."
Note: http://www.mrhengineering.com/Evaluation.htm
Predicts 175grn 308 @ 2901 fps w/32" barrel which is 3271 ft lbs.
So-> Kel Tecs data is just for one loading, and they are probablybeing conservative with their chamber pressure.
Here is an online ballistics comparison/graph of the above load compared to .300 mag (180gr):
http://www.ipgeneral.com/cgi-bin/cgiwrap/renegade/rifle4.pl?LOADNAME=RFB+32inch+210&MZVEL=2500&300MAG=YES&WEIGHT=210&COEF=.631&RANGE=1000&HEIGHT=1.5&ALTITUDE=50&TEMP=80&TRIGGER.x=18&TRIGGER.y=23
Comparison with other calibers
http://www.ipgeneral.com/cgi-bin/cgiwrap/renegade/rifle4.pl?LOADNAME=32+Inch+Target+RFB&MZVEL=2500&AK47=YES&M16=YES&NATO=YES&REM7MM=YES&300MAG=YES&460MAG=YES&WEIGHT=210&COEF=.631&RANGE=1000&HEIGHT=1.5&ALTITUDE=50&TEMP=80&TRIGGER.x=20&TRIGGER.y=17&TRIGGER=FIRE
So, the 18" and 24" models are getting just over 1 MOA
The more expensive 26"SS and 32", both with adjustable triggers,
are getting sub MOA
*Sorry about the long links
Note, his posts all come with the caveat:"The opinions expressed above are not necessarily official Kel-Tec statements.....Use at your own risk."
"The 18" and 24" sporting versions are going to be the first versions to be put in production. The 32" and 26"SS versions will still take more development time and will therefore get into production later. We want to spend more time and effort on them and make sure they are as close to perfect as possible. The lessons learned in manufacturing the sporting versions will help when putting the Target models into production.
The target models (26SS and 32) have consistently gotten under 1 inch groups at 100yds, the sporter models have been slightly over 1 inch (average)."
"We have been loading some specific loads for the 32 inch barrel RFB and we have been able to reach our goal of 2500fps muzzle velocity with a 210gr bullet (Berger 308210V), fired in a 32inch test barrel. This leads to a calculated muzzle energy of 2,915 ft-lbs.
This is lower than some of the estimates posted here, but this heavier, high Ballistic coefficient bullet (BC=0.631) allows for more energy retention at long range (1200m is the goal)."
Note: http://www.mrhengineering.com/Evaluation.htm
Predicts 175grn 308 @ 2901 fps w/32" barrel which is 3271 ft lbs.
So-> Kel Tecs data is just for one loading, and they are probablybeing conservative with their chamber pressure.
Here is an online ballistics comparison/graph of the above load compared to .300 mag (180gr):
http://www.ipgeneral.com/cgi-bin/cgiwrap/renegade/rifle4.pl?LOADNAME=RFB+32inch+210&MZVEL=2500&300MAG=YES&WEIGHT=210&COEF=.631&RANGE=1000&HEIGHT=1.5&ALTITUDE=50&TEMP=80&TRIGGER.x=18&TRIGGER.y=23
Comparison with other calibers
http://www.ipgeneral.com/cgi-bin/cgiwrap/renegade/rifle4.pl?LOADNAME=32+Inch+Target+RFB&MZVEL=2500&AK47=YES&M16=YES&NATO=YES&REM7MM=YES&300MAG=YES&460MAG=YES&WEIGHT=210&COEF=.631&RANGE=1000&HEIGHT=1.5&ALTITUDE=50&TEMP=80&TRIGGER.x=20&TRIGGER.y=17&TRIGGER=FIRE
So, the 18" and 24" models are getting just over 1 MOA
The more expensive 26"SS and 32", both with adjustable triggers,
are getting sub MOA
*Sorry about the long links
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Howcome this page is so damn wide? That suxxx![:(!]
Jeff[:D]0
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