MALPH:
First day I got the gun with OPEN SIGHTS as received from the factory.
I was in a hurry, hands were cold, light going fast, and the wind was blowing, so I didn't get to do as much testing as I wanted to. Will get to it soon.
The loads were:
240gr SWC Lasercast (.431)seated to 1.500" OAL and crimped lightly over the front drive band. Multi-x Starline cases and Winchester WLP primers.
5.6gr of HP 38 (Vel: 739 fps)
10.6gr of HS6 (Vel: 1,035 fps)
9.4 gr of Longshot (Vel: 1,078 fps)
265gr SWCGC (429244) (.429) seated deep and crimped over the front drive band. Multi-x Starline cases and WLPs.
16.9gr A2400 (Vel: 1,142 fps)
When seated deep (as was done here), this load will run right at 1,200 fps from a 6" barrel.
Federal Factory 240gr JHP (No. 44A) Vel: 1,217 fps
(We chroned this load at 1,375 fps from a 7 1/2" Bisley Hunter.
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Mounted a 4x Leupold on the M69 to do some load development. It was windy, and even though I had a good rest, it was not perfectly stable.
Loads are marked on the targets. The 265 SWCGC crimped over the front drive band chronoed 1,142 fps and the 310gr Lee FPGC chronoed 1,141 fps (not a typo) seated and crimped in the top grove (short OAL). Both at 50 - 60 deg F and 5 long paces from the muzzle.
The 240gr/6.5gr HP38 is seated deep (1.502 OAL) and runs 883 fps on the chrono.
As most know and the targets show, it pays to test various loads to determine best potential accuracy.
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Tested POI vs POA with various bullet weights and velocities. This was done with the rear sight BOTTOMED OUT. Different shooters will get different results.
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Paul