40 S&W Cartridge Overall Length - Pistolsmith
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Old 11-26-2006, 02:41 PM   #1
 
Join Date: Jul 2006
Posts: 12
40 S&W Cartridge Overall Length

I recently purchased an Infinity Sight Tracker (won't fire factory loads) and I am incrementally trying to get to the right overall length for my rounds. I started off with what the Speer manual had stated 1.125 which didn't work. I've worked my way up to 1.214 and there has been improvement but I'm still getting a few FTF's. Some SVI owners have said that I should be taking it up to a longer length and that differs with who you talk to.

I noticed that the 10mm COL is 1.250 and the only difference is tha actual case length. Can anyone explain to me the disparity in the OAL between the 10mm and the 40SW and I would appreciate feedback on what fellow Infinity 40SW shooters are loading their rounds to.

Finally, I will be heading out of state for training and matches (requires flying) and I would prefer not to make thousands/hundreds of rounds and then ship them to where I'm going (it's a hassle and it gets expensive). Again, I would appreciate some feedback on why the model gun I bought doesn't run with factory ammo.

Thanks,
 
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Old 11-26-2006, 03:20 PM   #2
 
Join Date: Nov 2001
Posts: 951
40 Cal Length

Duffy,
The length a 40 can be loaded to depends on how much free bore the chamber has. I chamber with more freebore than most......180gr at 1.250.
To some shooters......the loads look "funny".....Short case, lots of bullet stickin' out, all things bein' equal, more free bore equals less presure....higher velocities and less recoil.
Thanks,
Bill Caldwell
 
Old 12-01-2006, 06:15 PM   #3
 
Join Date: Apr 2001
Posts: 241
What bullet, what powder load?

I had an STI Edge that I ran Montana Gold JHP's through at 1.22 with VVN320 powder at I believe 5.1 grains,,,,,it made major and was super reliable.

Oh,,,,I ran the ammo through a crimp die on the final station as well.

All was good in STI world with that load,,,,,just ran and ran.
 
 
Old 12-01-2006, 08:09 PM   #4
 
Join Date: Sep 2001
Posts: 520
I load my .40 S&W cartridges to 1.230 -.250. I currently use 180 grain bullets and have gone as light as 170. This length worked in my P-16 and now works in my Sight Tracker.
 
Old 12-02-2006, 06:42 AM   #5
 
Join Date: Nov 2001
Posts: 951
Talkin' to a friend yesterday. He says, "I Have to taper crimp Long Loaded 40 loads at .420" for My STI to be reliable."

Thanks,
Bill Caldwell
 
Old 12-02-2006, 06:27 PM   #6
 
Join Date: May 2001
Posts: 373
Excuse me but a +2000$ gun that wont shoot factory ammo ? I have long and shortloaded for various reasons but tend to set up my guns to run on somekinda factory commonly available load then adjust my reloads accordingly. Although I guess it is common for .40 S&W's to need longer than normal loads in 1911's I find it odd Para ordnance could figure it out for 499.99 but people feel like it's ok for a $2000 semi custom to not run on standard big three ammo. Send it back tell STI to fix their gun maybe if enough people do that there QC will come back to what it used to be
 
Old 12-03-2006, 10:53 AM   #7
 
Join Date: Aug 2001
Posts: 16
Unfortunately, folks, feeding reliability does not lie only in cartridge OAL. It is in the magazine, specifically the feedlip dimensions. Take a look here -

http://www.brianenos.com/forums/inde...agazine+tuning

Brian knows more about tuning SV mags than about anyone.

I also run a SV and I load my own ammo. Once I had my magazines tuned correctly, I've never had an issue that wasn't my fault.

And, I've never given a thoguht to factory ammo? Why? Because the ammo I load on my machine is (1) more accurate than factory ammo (2) shoots softer than factory ammo and (3) is far, far less expensive than factory ammo.

If you don't like the fact that your custom gun doesn't run on factory ammo :roll: , call SV and speak with Brandon or Sandy.
 
Old 12-03-2006, 02:04 PM   #8
 
Join Date: Nov 2001
Posts: 951
Question Was About Overall Length

Duffy1 ask about OAL. Most answers pertained to OAL

BigDave....With all due respect Sir,....Some that post on this forum know as much about mags as Brian Enos or anybody else walkin' or talkin'. The easiest and the least costly way to learn what a correctly set up mag is? Buy one complete from GRAMS. The STI tubes I bought from Brownells, along with the springs, follower,and basepad worked. Haven't had a problem I could say was mag caused. Is the one from Grams better?......I don't know. How can You tell when they all work? After a while I replaced the internal parts with GRAMS, Not that they were causein' problems....I like the GRAMS base better.

Thanks,
Wild Bill
 
Old 12-03-2006, 04:30 PM   #9
 
Join Date: Aug 2001
Posts: 16
Re: Question Was About Overall Length

Quote:
Originally Posted by Bill Caldwell
Duffy1 ask about OAL. Most answers pertained to OAL

BigDave....With all due respect Sir,....Some that post on this forum know as much about mags as Brian Enos or anybody else walkin' or talkin'. The easiest and the least costly way to learn what a correctly set up mag is? Buy one complete from GRAMS. The STI tubes I bought from Brownells, along with the springs, follower,and basepad worked. Haven't had a problem I could say was mag caused. Is the one from Grams better?......I don't know. How can You tell when they all work? After a while I replaced the internal parts with GRAMS, Not that they were causein' problems....I like the GRAMS base better.

Thanks,
Wild Bill
Truly, you have a dizzying intellect. 8)

Yeah, Bill, I'm sure you and a host of others here and elsewhere know a lot about mags. But I'm pretty sure that few if any of them (1) worked for SV, let alone (2) designed designed a follower for those magazines - like Brian Enos did. And, I'm not exactly sure how my previous post somehow did any injustice to anyone I didn't mention, but I'm sure you'll be here in a quick second to tell me about it.

Personally, I default to Brian then Bevin then Bob Londrigan when it comes to SV magazine tuning. Properly dimensioned and polished feedlips, good springs (ISMI or Grams), good followers (SV or Grams) and proper OAL (I run mine at 1.190" for 40 S&W) solved my FTF issues in my SV.

Duffy1 - I hope this advice was useful.
 
Old 12-04-2006, 03:14 AM   #10
 
Join Date: Nov 2001
Posts: 951
D I????

DIZZYING INTELLECT????
When I signed up over here I didn't see a blank space on My application to enter My I.Q.

Little Davey .....There's a bunch of Us on Pistolsmith that can equal or surpass any thing Brian Enos or You have designed. Dane Burns designed and markets the best HAMMER, SEAR,and DISCONNECTOR there is. BUT ....the deal is....What can You Do? I can't run on what Brian Enos can do , or what Dane Burns can do. You can't either. I survive on what Wild Bill Caldwell can do and that's just the way the world is.

Little David....What's DIZZY is the way some of You people on Mako Mazo Kneel at Brian's feet and worship at His alter of zen.

Thank's,
Bill Caldwell
 
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