Some Smokeless Loads For The Chiappia (Armi Sport) Spencer

DISCLAIMER:  THESE LOADS ARE FOR INFORMATION PURPOSES ONLY.  Shooting is dangerous and you must take care when doing hand loads, one mistake and you could cause yourself serious injury or death.  I take no responsibility for any deliriousness effects resulting from this information.

ALSO, these loads are ONLY for the Chiappia (Armi Sport) Spencers.

Since the last Tennessee State Match, I've been working on some loads using Trail Boss, 5744 & Unique.

The following is some load data I think will work for you.  Note the chronograph used was a ProChrono Digital PAL Chronograph and is accurate +/- 5 fps.  I used 4 loads weights per powder that I chronoed, the muzzle velocity results from these loads are in BLUE.  The curve fit values are in RED.  I used linear regression to extend out the load values.

For long range (100 yards +) I've changed my load from 8.8 grains by weight of Trailboss under a 350 grain lead flat-nose bullet to 19 grains by weight of Accurate 5744 under the same bullet.  I really like this load it seems crisper and tighter in its groupings.  I will still be using Trailboss for my Cowboy shoots though.

5744	Charge (gr.)	17	17.5	18	19	20	21	22	23
	Muzzle Vel.	820.46	841.33	862.2	904.8	945.1	986	1070.9
Unique	Charge (gr.)	5.5	6	6.5	7	7.5	8	8.5	9	10	11
	Muzzle Vel.	606.03	660.20	714.37	775.1	822.71	869.7	931.05	979.9	1093.6
Trail Boss	Charge (gr.)	5.5	6	6.5	7	7.5	8	8.8	9	10	11
	Muzzle Vel.	700.9	726.99	783.2	808.76	842.1	876.91	929.3	945.06	1013.21	1081.36

If you want to extend these out further you can use the following formula for each powder:

5744	Theoretical Muzzle Velocity = 41.74 * CHARGE_WEIGHT + 110.88
Unique	Theoretical Muzzle Velocity = 108.34 * CHARGE_WEIGHT + 10.16
Trail Boss	Theoretical Muzzle Velocity = 68.1487 * CHARGE_WEIGHT + 331.7228

Keep in mind that errors will accumulating as you go out from the ends.