17 HMR & 17 mach 2 what is the difference?


PDA






one2watch
January 6, 2008, 04:22 PM
I have been kicking around gettin one of these crittin killers. What is the difference between the 2? trajectory? ammo price?

If you enjoyed reading about "17 HMR & 17 mach 2 what is the difference?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
Vern Humphrey
January 6, 2008, 06:34 PM
The .17 HMR is a necked down version of the .22 WMR, whereas the .17 Mach 2 is a necked down version of the .22 LR. The .17 HMR therefore has more velocity and a flatter trajectory. Ammo price for both is pretty high -- although if you compare the .22 versions of the same cartridges, the .17 HMR isn't all that bad compared to the .22 WMR, whereas the .17 Mach 2 is way higher than .22 LR ammo.

eliphalet
January 6, 2008, 07:10 PM
Good comparison's are available here



http://www.federalpremium.com/ballistics/Ammo_Search.aspx?act=choose&firearm=3&s1=1

Edit: My mistake, has Federal stopped making 17 mach2 ?
Try here,

http://www.cci-ammunition.com/ballistics/rimfire.aspx

gbran
January 6, 2008, 09:41 PM
Here is a link to a ballistics chart for .17m2, .17HMR and .22

http://www.rimfirecentral.com/forums/showthread.php?t=98329

rangerruck
January 7, 2008, 12:30 AM
actually the 17mach 2 is based on the stinger case, which is .o1 inch longer than a 22lr. there is a round out there that is strictly based on the 22lr, which is the 17 Aguila, or pmc, or hi standard. you can fire the 17 aggie through a mach 2 no probs. you can also get the mach 2 ammo for as low as 3.50 a box, which certainly puts it in plinking fun usage, along with 22lrs, that are 2 or 3 bucks a box. I am totally obsessed with the mach 2 right now, and love them to pieces. the 17hmr , is not a plinking round, and I do consider it strictly a hunting round, as it will positively blow up small game, and will ruin skins of fox, coyote , and such. It also has a 66 yard trajectory/energy advantage over the mach 2, so it really is an ideal round for a big prairie dog, squirrel hunt, if you are going for quantity. the mach 2 zero'd at 100 yds, is 5 inches low at 150, the 17 hmr, going through some of your better barrels at almost 2700 fps, with a 100 yd zero , will only drop 7-8 inches all the way to 200 yds.
the reason the hmr is not a plinking round, is that they are now 11 to 15 bucks per box, a ton more money than the mach 2.
A lot of dudes who have tried it, say the mach 2, placed at the base of their neck, or just under the wing joint, makes a great turkey round.

tuck2
January 7, 2008, 04:28 AM
The 17 Gr V-Max bullet fired from a 17 HM2 rifle has a muzzle velocity of 2100 ft/sec with the bullet having about 100 ft/lb of energy at 80 yards. The 17 Gr V-Max bullet fired from a 17 HMR rifle has a MV of 2550 ft/sec with the bullet having about 100 ft/lb of energy at 150 yards. One way to find the cost of ammo is at www.rimfirecentral.com

rangerruck
January 7, 2008, 05:23 AM
yes Tuck, but those are old measurements; there are dudes with some good equipment, and good bbls, been testing both bbls and ammo for a while now. A lot of these guys are regularly breaking 2600 fps with the 17hmr ammo, while Eley/remington ammo in mach 2 is hot loaded, and speeds there are approaching 2300fps , regularly , with those two ammo's.

If you enjoyed reading about "17 HMR & 17 mach 2 what is the difference?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!