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9/22/2017 12:11:25 AM
Posted: 12/11/2003 4:00:53 PM EDT
[Last Edit: 12/11/2003 6:39:17 PM EDT by RABID]
I already did the calculation of so many feet per second to each extra inch of barrel, but in the real world we all know that things don't always add up. I was just wondering if anybody cronographed 115gr or 124gr, or heck, any other grain lead from a 16" tube?
Thanks in advance guys.
Link Posted: 12/11/2003 6:20:28 PM EDT
IIRC optimal bbl lenth for 45acp is 10.5" after that the velocity flatlines for a bit then starts dropping.
Link Posted: 12/12/2003 5:01:15 AM EDT
I don't have any info from personal experience, but i seem to remember somebody posting that 9mm works best in an 11 inch barrel. After that velocity drops off.
Link Posted: 12/12/2003 5:47:51 AM EDT
I chrono'ed some 115gr +P+ Fed out of a 16" HK94. According to the factory, these go 1350 fps (I think out of a 5" bbl). I recorded 1550 fps. Smokin!
Link Posted: 12/12/2003 6:07:02 AM EDT
Thanks guys. I was wondering what the optimum barrel length was. I kinda feared that the round would start losing it's full potential after about 12" of barrel, but 1550 f.p.s. from a 115grainer, that is smoking! I guess I won't worry about a little inefficiency due to extra length anymore!
Link Posted: 12/12/2003 8:07:18 AM EDT
Tell you what - maybe over the holidays I will do an informal unscientific experiment: I will chrono, out of a 16" HK94 and a 4.5" SP89, a variety of 9mm ammo and post the results here. Look for the info after the 1st of Jan.

Everybody have a great holiday and safe new year.
Link Posted: 12/12/2003 12:29:31 PM EDT
Pazzo, that's great! Thanks a lot to all of you. I am going home for leave today, so I may or may not be on this site until new years, so merry christmas ans safe shooting to all!
Link Posted: 12/12/2003 2:36:07 PM EDT
If you reloaded you could probably get some really good velocities by using a slower powder that takes advantage of the longer barrel. Rifles can also usually take higher pressures so loading hotter overall is usually ok.
Link Posted: 12/14/2003 3:33:46 PM EDT
[Last Edit: 12/14/2003 3:40:32 PM EDT by SBR7_11]
Good evening, don't usually do the "Armory", but I am being adventurous...

Using Win USA 9mm Value pack, I came up with 1364 from the 10" Uzi pipe, and 1398 from the 16" Uzi pipe.

Using 5gr of 3N37 with 150gr Zero FMJ, I came up with 992 from the 10", and 1047 from the 16".

Using 5gr of #5, 873 from 10", 898 from 16".

Using 8.0gr #7 w/124 RNL-GC RCBS bullet, avg was 1331 + 1338.

S+B (new stuff going around), 1296 from 10", 1330 from 16".

1 round of Wolf (range pik-up), 1418 from 16".

45acp, Wolf case, RCBS 230 RNL mold, 7.3gr 800X, 1071 from 10" Uzi---nice bump when fired.

45acp, Wolf case, 8.3gr Win 540, RCBS 230 RNL mold, 1082 from 10" Uzi---more nice bump when fired.

45acp, brass case, 8.5gr #5, same lead bullet, no chrono yet, gave me a small bruise/sore arm after shooting for an hr at Bulletfest.

I have some L7A1, not used it yet, be interesting to get across the chrono, then see if I can dulicate.
Link Posted: 12/14/2003 5:30:45 PM EDT
so SBR the wolf was actually hotter than the winchester and the S&B?

How well do the wolf cases do when reloading. I throw all my .45 cases away after shooting because I didn't think the wolf cases reloaded well even though they are boxer primed.
Link Posted: 12/15/2003 4:21:26 PM EDT
The 9mm Wolf was only 1 round, and it was a range pick-up. The S&B was a handfull of pick-ups also from the Indiana Subgun shoot this past May, seems there was a lot of it used there/ being sold. I used the Win Value Pack stuff in one of the guns I borrowed, so I havd a bunch laying around.

The Wolf 45 was sort of a following, an old IPSC fella around here has been reloading Wolf 45 cases a while, so I picked up a bunch, cleaned up a little bit, chamfer inside the case mouth, reload as usual, been using those for lead, no problem here. If I lose 1, no big deal, somebody will leave some more 1 fire somewhere, just need to find it quick, before the rust gets it. Saves the brass for more important use, whatever that might be....
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