Here is another good link that includes the BB loads...comparing it to several others...
http://smith-wessonforum.com/ammo/14...aph-tests.html
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Here is another good link that includes the BB loads...comparing it to several others...
http://smith-wessonforum.com/ammo/14...aph-tests.html
Oh well, I’ve been wrong before. I’m really surprised that the BB and the Underwood are both at 28,500psi. I wouldn’t shy away from using any of them if I need them but I would like 24,000psi better. Thanks to Larry.we have real figures to work with.
Doesn't really bother me at all as it is well south of 9mm, .38 Super and .357 Magnum and right in that sweet spot velocity wise that balances performance and control.
Larry, have you ever done any pressure testing on 158 grain Boolits and 38 special at 5.5 and 6.0gr unique?
Very interesting thread, thanks Larry
:drinks:
Yes, I have. The 5.5 gr Unique load under a soft cast HP'd 358156 seated to front groove in Winchester 38 SPL cases is my standard FBI LSWCHP load duplication. I produces the same velocity as the older original Winchester load I carried for LE duty back in the mid/late '70s. Pressure wise, it runs at the top end of SAAMI's criteria for +P 38 SPL.
What are you running for velocity..950 from a 4"?
I’ll bet you guesstimated that within 20fps. Of course I could be wrong.
The 1980+- vintage FBI load from Federal, Winchester and Remington generally runs between 875 and 950 from a 4" barrel. I was with Allan Jones one day at the Dallas P&R Club as he was testing a new batch of Federal (I believe) ammo. It was 950 on the nose which was the highest velocity I've ever seen for that load.
From what I have read all three makers made bullets of different hardness levels and HP shapes so expansion and penetration varied. There was also lot to lot differences from the same maker...
[QUOTE=Wayne Dobbs;5594984]Larry,
You may recall I sent you 10 of the standard pressure BB DEWC loads last year. They were not standard pressure, as advertised.[/QUOTE
Yes, those were +P but not +P+ like the SWCs..........
I'm a little late to the party to start paying attention to this thread. Larry, yours is the first pressure testing of Buffalo Bore and Underwood 38 Special +P loads. I have always wondered how they achieved such ballistics and stayed within SAAMI pressures. Apparently they don't because the laws of physics still apply.
38 Special SAAMI MAP is 17,000 PSI
38 Special +P SAAMI MAP is 20,000 PSI
These companies are apparently selling ammo loaded to 28,500 PSI as 38 Special +P but it's actually 40% OVER SAAMI +P pressure.
I don't doubt it's good ammo- if shot in a 357 Magnum chambered gun. I sure wouldn't shoot this stuff in a gun that's not a 357. This ammo can't be good for the life of an alloy frame S&W 637/642/442. I'd even refrain from using it in a S&W Model 10. Someone earlier commented that they wouldn't use this ammo in a gun that's not also chambered in 357 Mag. Just bear in mind that not all frames of a given size are actually the same. For instance a S&W K frame Model 10 and a K frame Model 19 frame are not the same in terms of frame strength.
Begging your indulgence, I prefer not to get involved in that end of the discussion.
"Just bear in mind that not all frames of a given size are actually the same. For instance a S&W K frame Model 10 and a K frame Model 19 frame are not the same in terms of frame strength."
TD...just wondering where you got your information...
Do you have information that a Model 64 frame (.38 Special) and Model 65 frame (.357 Magnum) have gone through a different heat treating process?
Thank you...Bob
Bob
Bob I didn't write that first sentence you have there. But since you posted it I'd like to say that they do heat treat the 38 Special and 357 Magnum cylinders differently. I didn't use to think so, but was told different. My argument was they were going to send the cylinders through the heat treating oven so why not both. I was told I was wrong. I never worked in that process I don't know.
I get my information from a lot of source and have good number of friends in the industry. I don't rely on the internet for any of it.