Wildcats based on the 5.7x28mm

.10 Caliber (potential/future)

.12 Caliber (potential/future)

.14 Caliber (potential/future)

.17 Caliber:
.17"x28mm AKA 4.5x28mm
4.4x28mm
4.7x28mm (Typo?)
17 Velociraptor - based upon the same case, but not the same magazine system. (Bolt action rifles usually)

25 gr vmax bullet from a rifle @3200 fps
18 gr bullet @ 3652 fps.

.19 Caliber:
4.85x28mm AKA .19"x28mm (Using Jim Calhoun's bullets) - conceptual stage only.

.20 Caliber:
.20 Shrike,
.204 short
5mm Shrike - based upon the same case, but not the same magazine system. (Bolt action rifles usually)

.243 Caliber (potential/future)

.25 Caliber (potential/future)

.270 Caliber (potential/future)

.280 Caliber (potential/future)
(would have just about straight walled case)

http://www.varminter.com/forums/lofiversion/index.php?t7230.html
Posted by HarleyD Oct 8 2005, 04:11 PM
well guys i think i have finally come up with the perfect fox/small game rifle cartridge combo.
the rifle is the cz 527, originaly in 22 hornet. we chambered it for the 5.7X28 fn round necked down to 17 caliber.
as you guys know i have harvested a fox or two in my life. this brought me to the conclusion, a 20/25 grain 17 caliber bullet traveling at 3000 fps will go in and not come out. thus preserving the value of the fur without becoming a seamstress, i hate sewing up holes.
the 17x28 produces 3000+ with both bullets on less than 10 grains of powder. that translates into 700 shots per pound of powder. thst makes it about as cost effective as the 17 hmr but with real slam there butts into the ground performance.
here is my test results.

Powder charge bullet weight velocity group
WW 680 9.4 Hornady vmax 20 3359 .62
WW 680 9.6 Hornady vmax 20 3430 1.51
WW 680 9.8 Hornady vmax 20 3547 .51
WW 680 10.1 Hornady vmax 20 3642 .43
aa1680 9.4 Hornady vmax 25 2911 5/.43 4/.33
aa1680 9.6 Hornady vmax 25 3077 .62
aa1680 9.8 Hornady vmax 25 3090 .55
aa1680 10.1 Hornady vmax 25 3112



aa1680 10.2 Hornady vmax 25 3166 .50
aa1680 10.3 Hornady vmax 25 3208 .48
aa1680 10.3 Hornady vmax 25 3132 1.026
aa1680 10.3 Hornady vmax 25 3162 .674
aa1680 10.3 Hornady vmax 25 3199 .750
aa1680 10.3 Hornady vmax 25 3238 .924
n120 8.8 Hornady vmax 20 2993 .822
n120 9.0 Hornady vmax 20 3087 .755
n120 9.2 Hornady vmax 20 3127 .57
n120 9.5 Hornady vmax 20 3283 .461
n120 9.7 Hornady vmax 20 3312 .2


n120 9.9 Hornady vmax 20 33384 .293

Posted by foxhunter:
the 17x28 is a version of paul rodgers 4.4X28, based on the FN 5.7X28 machine gun and pistol round. basicly it's a 17 ccm on viagra or a limp 17 ah. the cartridge may very well be the best fox round. if the case will deliver 3000 fps with a 25 gr bullet, it will march everybodies blue dot loads for the 17 Mach 4 and 17 remington. instand death with 0 pelt damage, a fox hunters dream.
http://www.fortliberty.org/military-library/fn-5.7.shtml