From
Handloader issue 274 (October 2011), "Magnum Revolver Loads with Alliant Power Pro 300-MP", pages 20-23, we have a little bit of data.
.327 Federal loads were tested in a 7.5" Sparrowhawk.
No OAL is stated.
Code:
Bullet Charge (grains) - Velocity (fps) - Primer - Case - Velocity Spread (fps)
90 gr Sierra JHC 13.0 1,451 CCI 550 Federal 47
" 14.0 1,498 " " 37
" 15.0 1,554 " " 77
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - -
100 gr Speer JHP 12.5 1,331 " " 30
" 13.5 1,400 " " 37
" 14.5 1,460 " " 32
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - -
115 gr Speer Gold Dot 12.5 1,301 " " 55
" 13.5 1,402 " " 50
" 14.0 1,436 " " 48
At first glance that data is a bit disappointing (to me - compared to my 5.5" Blackhawk). But, a statement within the article shows that this particular Sparrowhawk is producing slow velocities with factory ammo, anyway: "Incidentally, PP 300-MP is the only powder I have tried that made it possible to duplicate and exceed .327 Federal Magnum factory loads..."
I take that to mean that the 115 gr Gold Dot load is exceeding factory velocities in this Sparrowhawk (though still short of my Blackhawk's 1,480 fps - oddly).
So... if one of us has a wild hair looking for an anal orifice to enter... PP 300-MP may be worth a shot.