talk about a shallow gene pool, see any relation

[foxhunter]

http://img.photobucket.com/albums/v396/bobd/gun%20things/oc18_003.jpg

17 viper....22 viper and 6mm viper
anyone know how to calculate what kind of velocity the 22 and 6mm might be capable of? the case holds about 4 gr. more of h380 than the 17 ah.

if the 6mm were to reach 2650-2800 fps with a 55 gr vmax it would have close to 1000 ft pounds of energy.

[Rodgervich]

I can run it through QuickLoad if you send me a print and OAL with seated bullet. Best if you can also supply capacity of water full to top of mouth.
There are some formulas you can use for extrapolation, saw it in Handloader Magazine not long ago, I'll see if I can dig it up.

[17VLD]

Sometimes I wish I never dismanteled my 6/221.
It shot very well and was lots of fun too.Bet those cartridges are lots of fun to shoot.Looks like quite a pedigree there.
TTFN
Matt

[Jay T.]

Looks like a little gap between the 17 and 22. A 204 viper would fit in there just right.


Jay T.

[foxhunter]

http://img.photobucket.com/albums/v396/bobd/gun%20things/34593B43357Ffp33B3Dot3E23533D3783D9.jpg

i don't see a gap, just couldn't find the case for the picture. i have a feeling the 22 viper would be close to the 218 bee.

what kind of velocity were you getting from the 6-221 and with what bullet?

[DittoHead]

What is the Viper’s parent case?

[17VLD]

He had some 60's and 62's that shot very well.
I did'nt have a chrono at that stage of my reloading career
so I'm not sure Bob about the speed.
TTFN
Matt

[foxhunter]

i have made cases from 221 fb, 222 rem, and 223. range test today with new 221 fb brass formed to 17 viper were as follows
14.2 gr rl 7 71/2 rp 3711 fps
14.4 gr rl 7 71/2 rp 3731 fps
14.6 gr rl 7 71/2 rp 3772 fps
all were shot with 25 gr hornady hp, this was an experiment to see what max load would be without expanding the primer pockets. all primers were as tight as new and groups with fireforming loads were in the .6 range for 5 shots.
i'm anxious to see just how well the 6 mm viper thumps Punxsutawney pete (groundhog) at 200 yards and how quiet it is.

[DittoHead]

What’s the difference between the .17 Mach IV and .17 Viper?

The 6mm version should be a real thumper if you can get 1000 ft. lbs. Heck, even if you can’t get that much it’ll be fun.

[Daryl]

I seem to recall the Viper had a 18.0 capacity and my .17AB ran 18.1. Sounds close to me.

[Dr. Bubba]

go on to the quarterbore. ;)

[Daryl]

i have made cases from 221 fb, 222 rem, and 223. range test today with new 221 fb brass formed to 17 viper were as follows
14.2 gr rl 7 71/2 rp 3711 fps
14.4 gr rl 7 71/2 rp 3731 fps
14.6 gr rl 7 71/2 rp 3772 fps
all were shot with 25 gr hornady hp, this was an experiment to see what max load would be without expanding the primer pockets. all primers were as tight as new and groups with fireforming loads were in the .6 range for 5 shots.
i'm anxious to see just how well the 6 mm viper thumps Punxsutawney pete (groundhog) at 200 yards and how quiet it is.

: Above test results seem to coincide with what I got from my .17AB. Mine maxed out at 15.3gr.Re#7, though for over 3,900fps(25gr.HP). It did have a long throat, though. 15.1gr. was the accuracy load for about 3,855fps.
: 15.1gr.Re#7, with a 20gr. Vmax gave m 4,008fps., but was a full 1/2 grain off max.
: This was one long throated barrel, and may be well over maximum in any other.

[foxhunter]

well here it is(far right) the 25 viper D.B. LOL, the empty spot is for the 20 viper. if anybody has seen it let me know, i seem to have miss placed it.
http://img.photobucket.com/albums/v396/bobd/gun%20things/oc19_001.jpg

daryl the 17 viper holds 18.1 after being fireformed and resized to be reloaded.
i wonder just how close it is to the killer bee? i would imagine they are close, i show one lost with a 3835 fps velocity in the viper. i am guessing that most are shooting the killer bee single shot, where as the viper will feed most bullets from the clip

[Dr. Bubba]

Hmmm wonder if we could horse trade for a dummy 25 Viper?

You know the 20 viper sounds interesting.

DB
cacomistles AT hotmail DOT com

[Mntngoat]

i am guessing that most are shooting the killer bee single shot, where as the viper will feed most bullets from the clip


Magazine fed? The only thing I have that feeds from a magaizine is my shotgun!

:D

[foxhunter]

i don't have one with a magazine or that holds more than two shells.

[georgeld]

Fine looking set Bob.

[Daryl]

well here it is(far right) the 25 viper D.B. LOL, the empty spot is for the 20 viper. if anybody has seen it let me know, i seem to have miss placed it.
http://img.photobucket.com/albums/v396/bobd/gun%20things/oc19_001.jpg

daryl the 17 viper holds 18.1 after being fireformed and resized to be reloaded.
i wonder just how close it is to the killer bee? i would imagine they are close, i show one lost with a 3835 fps velocity in the viper. i am guessing that most are shooting the killer bee single shot, where as the viper will feed most bullets from the clip

: I recall my .17AB held 18.1gr. We've had this conversation before. The Killer Bee might run that up another couple tenth's with probably no increase in ballistics, it's so close. Actually, going slightly largrer makes no difference. There is very little difference even going to the MachIV case of something like 22gr. capacity.