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Member
Thought some may be interested.
Initial thread/s here:
http://www.thehighroad.org/showthread.php?t=602337
http://www.thehighroad.org/showthread.php?t=602484
I realize this data is not enough to make a clear judgement, but at first blush it appears that those who thought that a crimp might adversely affect accuracy were mistaken, at least in this combo in my revolvers. The Red Dot loads seemed better when crimped I think. They also didn't like being seated flush.
I also found it interesting that the crimped rounds in one load impacted/grouped significantly higher than the non-crimped ones.
The recommended Trail Boss loads were ridiculously light.
I'm still a noob at this, so let me know if you see anything missing that I should have noted in the notes below.
I also think I may need glasses.
All groups are 5 shots unless otherwise indicated.
.38 Special Mixed brass CCI SPP Speer 148 grain Bevel Base wadcutters. Loaded in Lee Classic Turret, Lee deluxe dies. Brass/primers all look good.
2.1 Trail Boss seated flush, no crimp. 10 yards, seated from a rest.
M10 2” barrel: 3” Impact right, vertical stringing. Light recoil.
M28 4” barrel: 2” impact center low.
2.1gr Trail Boss seated to crimp groove, no crimp. 10 yards seated from a rest.
M10 ~4”, erratic pattern, low center
M28 <3”, low
2.1 Trail Boss seated to crimp groove, crimped. 10 yards seated from a rest.
M10 4 shots <2”, one flier 3”. Impact low, slightly right. Recoil maybe a bit more. Still light.
M28 <2”, low center
M10 15 yards 4”, 3 dead center in 1” group, 2 fliers together.
M28 15 yards, <3”, low
3.5gr Red Dot, seated flush, no crimp, 10 yds seated from a rest.
M10 3” group, 3 shots center, 2 shots low. Firm recoil.
M28 4 shots 1” dead center, one flier 2.5”. Nice recoil.
3.5gr Red Dot seated to crimp groove, not crimped 10 yds seated from a rest.
M10 4” impact left/center, unburned powder on ejection. Firm recoil.
M28, 2” Center.
3.5gr Red Dot seated to crimp groove, crimped, 10 yds seated from a rest.
M10 no unburned powder, 2.5” Impact .5” high center.
M28 some unburned powder, 1.5” group 1” high.
4.1gr Red Dot, seated flush, no crimp, 10 yds seated from a rest.
M10 4 rounds, 6” impact left/low. Sharp recoil similar to factory 158 JHP (shot back to back)
4.2gr Red Dot, seated to crimp groove, not crimped 10 yds seated from a rest.
M10 4” sharp recoil
M28 4 shots fired, 3 in 1” center, one flier 2.75” group.
4.2gr Red Dot, seated to crimp groove, crimped 10 yds seated from a rest.
M10 3” center, sharp recoil
M28 1” center, firm recoil
Initial thread/s here:
http://www.thehighroad.org/showthread.php?t=602337
http://www.thehighroad.org/showthread.php?t=602484
I realize this data is not enough to make a clear judgement, but at first blush it appears that those who thought that a crimp might adversely affect accuracy were mistaken, at least in this combo in my revolvers. The Red Dot loads seemed better when crimped I think. They also didn't like being seated flush.
I also found it interesting that the crimped rounds in one load impacted/grouped significantly higher than the non-crimped ones.
The recommended Trail Boss loads were ridiculously light.
I'm still a noob at this, so let me know if you see anything missing that I should have noted in the notes below.
I also think I may need glasses.
All groups are 5 shots unless otherwise indicated.
.38 Special Mixed brass CCI SPP Speer 148 grain Bevel Base wadcutters. Loaded in Lee Classic Turret, Lee deluxe dies. Brass/primers all look good.
2.1 Trail Boss seated flush, no crimp. 10 yards, seated from a rest.
M10 2” barrel: 3” Impact right, vertical stringing. Light recoil.
M28 4” barrel: 2” impact center low.
2.1gr Trail Boss seated to crimp groove, no crimp. 10 yards seated from a rest.
M10 ~4”, erratic pattern, low center
M28 <3”, low
2.1 Trail Boss seated to crimp groove, crimped. 10 yards seated from a rest.
M10 4 shots <2”, one flier 3”. Impact low, slightly right. Recoil maybe a bit more. Still light.
M28 <2”, low center
M10 15 yards 4”, 3 dead center in 1” group, 2 fliers together.
M28 15 yards, <3”, low
3.5gr Red Dot, seated flush, no crimp, 10 yds seated from a rest.
M10 3” group, 3 shots center, 2 shots low. Firm recoil.
M28 4 shots 1” dead center, one flier 2.5”. Nice recoil.
3.5gr Red Dot seated to crimp groove, not crimped 10 yds seated from a rest.
M10 4” impact left/center, unburned powder on ejection. Firm recoil.
M28, 2” Center.
3.5gr Red Dot seated to crimp groove, crimped, 10 yds seated from a rest.
M10 no unburned powder, 2.5” Impact .5” high center.
M28 some unburned powder, 1.5” group 1” high.
4.1gr Red Dot, seated flush, no crimp, 10 yds seated from a rest.
M10 4 rounds, 6” impact left/low. Sharp recoil similar to factory 158 JHP (shot back to back)
4.2gr Red Dot, seated to crimp groove, not crimped 10 yds seated from a rest.
M10 4” sharp recoil
M28 4 shots fired, 3 in 1” center, one flier 2.75” group.
4.2gr Red Dot, seated to crimp groove, crimped 10 yds seated from a rest.
M10 3” center, sharp recoil
M28 1” center, firm recoil
