.38 Short Colt brass chrono report, 3.4gr Titegroup, 158 vs 160

[ysrracer]

Here's a couple of chrono reports using 3.4gr of Titegroup.

 

One is using 158gr Berry's flat point (plated), and the other is 160gr Bayou round nose (coated). Even thought the oal's are different, they're loaded to the same depth in the cartridge.

 

Shot thru my five inch 627

 

Name: .38 Short Colt: 158 Berry's Flat Point: Titegroup 3.4gr: OAL 1.125
Notes: S&W 627 5"
Shots: 7
Average: 770 ft/s
SD: 13 ft/s
Min: 752 ft/s
Max: 785 ft/s
Spread: 33 ft/s
Power Factor Average: 121
Power Factor Low: 118
Power Factor High: 124
Barometric Pressure: 30 in Hg
Temperature: 75 F
Weight: 158.0 gr.
Powder: Titegroup 3.4gr
Bullet: Berry's 158gr FP
C.O.A.L.: 1.125
Primer: Fed SPP
Case: Starline

[ysrracer]

Name: .38 Short Colt: 160gr Bayou RN: Titegroup 3.4gr: OAL 1.20
Notes: S&W 627 5"
Shots: 16
Average: 828 ft/s
SD: 16 ft/s
Min: 796 ft/s
Max: 868 ft/s
Spread: 72 ft/s
Power Factor Average: 132
Power Factor Low: 127
Power Factor High: 138
Barometric Pressure: 30 in Hg
Temperature: 75 F
Weight: 160.0 gr.
Powder: Titegroup 3.4gr
Bullet: Bayou 160gr RN
C.O.A.L.: 1.20
Primer: Fed SPP
Case: Starline

[ysrracer]

As you can see, the coated bullets chrono'd faster than the plated, at least in my gun.

 

ymmv

 

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Edited September 30, 2020 by ysrracer

[Fishbreath]

Thanks! Useful stuff, as I plan to work through my stock of Berry's in favor of something coated.

[ysrracer]

In my (limited) experience with coated bullets, they always chrono faster than plated bullets.

 

For some reason my 627 always needs 2/10ths of a grain more than any other gun to get the same velocity.

 

As always, consult a reloading manual before you start working up loads. Don't take anonymous information on the internet, especially from ex mini bike racers