Ozzy Fudd Posted August 14, 2009 Report Share Posted August 14, 2009 Need a bit of help if possible. I've been using remington target rounds in my 10/22 lately (with great results) but remembered last night i had about 150 subsonics (50 eley and 100 cci cb long's). i decided to check them out on the ballistics calculator i use to see how they compare to the remmys, so i could maybe use them up. i tried looking at the boxes but they gave very little info (the eley one had no info at all, the cci just said 29, long cb) so looked up a few rimfire ballistics tables on the net, and heres the info i got. remington target - bullet weight 40gr bullet, muzzle velocity 1150 (which i already knew) eley xp sub - bw 37.5gr, mv 1050 (im assuming these are the ones i have, didnt give the name or anything on the box) cci cb long - bw 29gr, mv 727 does this look right to everyone else? a 323 fps muzzle velocity difference between two brands of subbies? if these figures are correct then it seems eley subs follow quite a similar trajectoy to the remmys, but the cci's look dire! Quote Link to comment Share on other sites More sharing options...
casts_by_fly Posted August 14, 2009 Report Share Posted August 14, 2009 CB longs are a specialist cartridge and as such you can't compare them to a standard subsonic. CB longs don't have any powder in them- they use the priming compound for propulsion. And yes you will still get a lot of variation between brands because they are made to different standards. At 20 C and sea level the speed of sound is 1125 fps. So the remmy's you have listed at 1150 aren't going to be subsonic. However, each company will set a different speed for their subs because they will assume a different speed of sound in air (as it varies with temperature). To be safe, 1050-1080 is about as fast as you can go without occasionally going over the speed of sound at some point during the year. thanks, rick Quote Link to comment Share on other sites More sharing options...
Ozzy Fudd Posted August 14, 2009 Author Report Share Posted August 14, 2009 cheers mate B) should have pointed out i know the remmy's arent subs, i got a few different ammo types a while back to try out and still had the eleys and cci, didnt realise the cci's had no powder looks like ill be using them as fodder for the 30 round mags then Quote Link to comment Share on other sites More sharing options...
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