People argue this continuously. Yes, I know that people claim to do it all the time. They put a lot of trust on their 10mm's extractor to hold the 40 casing. It may work. Until it doesn't. It only takes one not to work to ruin your day.
Anyway, I was surprised to find this from Speer's FAQ: http://www.speer-ammo.com/general/faq.aspx#q25
Q. Can I shoot 40 S&W ammo in my 10mm pistol? The case is identical except for length.
A. No. Both headspace on the case mouth. The shorter 40 S&W will not be supported in the 10mm chamber, so headspace control is lost. You'll get misfires, blown primers, deformed cases and, potentially, gas jetting from the action. Always use the correct ammunition for your firearm. Don't cut corners!
Mr Fish's case is often cited as being the example of the possible aftermath in a self-defense shooting. In the end he was cleared and state law was changed but not before he spent time in jail and at a huge legal expense.
The prosecutor with a vendetta threw everything at Mr Fish and the jury believed it. They bought that hollow points showed intent to kill (vs the non-existent non-kethal bullets he apparently should have used) and that his 10mm Kimber was more powerful than even what law enforcement use -- forget that 10mm is a former FBI standard and law enforcement issued round and was, in fact, designed for law enforcement.
ID Channel had an episode on this case and the interviews with the former jurors were shockingly revealing. Several attempts on my part to get the show to update that Mr Fish was cleared and the law changed were unacknowledged.
I have made requests on their other stories for corrections updates and they did respond. Seems perhaps they have made up their mind and continue to run it showing Mr Fish guilty. So much inaccuracy and bias. I wont watch the channel now. But he was finally cleared legally even if ID won't acknowledge it.
May Mr Harold Fish rest in peace.
I get asked about this occasionally and the primary source link seems to disappear/move:
There it is, in writing, proof that the world's most elite cold weather warriors carry Glock 20 10mm's.
The choice of a Sirius Patrol pistol was also determined by concerns about encounters with aggressive polar bears. Most Danish units use 9mm automatics like the CF but the Sirius Patrol learned through hard experience that 9mms had insufficient 'stopping power' to deal with angry adult polar bears. As a result, Sirius Patrol members carry a more powerful 10mm pistols for self-defence, employing the 10mm Glock 20 automatic.
and the footnote:
 The CF's 9mm Browning has begun to show its great age. The Danish approach to automatic pistols is well worth emulating. Perhaps DND should consider issuing a modern 9mm automatic to southern units and 10mm Glocks to northern Canadian Rangers as well as any 'southern' troops who are preparing to deploy to the north.
Here is another description too:
Slaedepatruljen Sirius - The Sledgepatrol Sirius (Arctic LRRP; Navy)
This very special unit maintains a permanent military presence in the arctic regions of North/Northeast Greenland. It's origins can be traced back to the WWII experience with "Operation Resolute", where a guerilla-force of hunters tracked and eliminated German meteorological stations. These stations would have provided vital weather forecasts to the German air force and navy.
In its present form, Sirius is based on small two man patrols with a dog sledge and 11 dogs. The service time is 25 months without any leave and the only outside contact, besides by radio, is the annual supply ship. The main patrolling activity is carried out in the 4 month winter period, where wind speeds of 100 knots or temperatures below -40 can occur. Under these conditions, the patrols must cover several thousand kilometers to complete their designated routes. This objective can only be achieved by using dogsleds, as snowmobiles would be noisy, require vast amounts of fuel, break down and be unable to warn against polar bears. Ultimately: You can't eat a snowmobile in a survival situation!
The weapons carried also reflect the harsh conditions. Only bolt-action rifles (M17/M53) performs reliably. The standard SIG210 Neuhausen sidearm was recently replaced by the 10mm Glock 20, as the stopping power of multiple 9mm rounds proved to be insufficient against a polar bear. The members are recruited from the regular services and must be sergeants at least. They may not be married or otherwise engaged and the selection procedure stresses the psychological evaluation of their personality. Of course, they must also achieve top marks at the NATO Arctic Warfare School in Norway.
Alaska State Troopers episode: Alaskan Standoff
This was an interesting episode that I saw this week (2/26) as a resident shot and killed two moose with a Glock 20 10mm to save his dog from continuing to be trampled.
We know it was FMJ ammo as the AST asked the resident to confirm that it was not hollow point ammo. Why that makes a difference (from a LEO standpoint) I am not sure, but more penetration from a hardcast or FMJ would be better in this case any way.
When asked how many rounds were used the resident said it was about 4. hmm..appears that the 10mm is indeed a good defense for the woods and pretty good for hunting too.
10mm enthusiasts knew that, but there are always some that seem to want more proof.
I was actually going to write an article about DoubleTap and Buffalo Bore ammo but I was pleased to see that Jeff Quinn of GunBlast.com has just (Jan 2012) written an article on the same topic complete with his on chrono #'s from a variety of platforms! This is awesome since it is the rainy season here and because of the overcast can never seem to get my Chrony to work.
Anyway it is a great article with up to date ammo info for fans of full power 10mm ammo.
Got my SwampFox 10mm! Here are some pics of this well regarded, and verified velocity, full power ammunition. The first two loadings are clearly stamped "FULLY SUPPORTED CHAMBER ONLY" (i.e. not for stock GLOCKs and some 1911's like the Colt Delta Elite and pre-2010 Dan Wessons). The source is SwampFox Ammo (swampfoxammo.com) and they have been great to deal with.
The bottom box is a little slower and will work in all 10mm's. The bottom box is still no slouch at almost 200fps faster than the comparable Hornady XTP 200gr load. The Hornady 180 and 200 have proven to be very accurate bullets and that is why chose them in these SwampFox loadings.
I got the 200gr loads (in particular the 200gr Hornady FP-FMJ) as a woods (camping/hiking) load. it should be a heck of a "thumper." I plan to carry a 1006 (My new 1006 post) while out trekking around. In fact, one of the reasons for getting a 1006 (actually I got two) was to have a beefier pistol with a fully supported chamber.
Here are the specs:
200gr XTP and 200gr FP-FMJ @ 1325fps (supported chamber)
200 XTP @ 1240fps
Can't wait to try it, should be a handful!
Well, in rebuilding my second 1006 into a 1066 I wanted to put in a 645 hammer because it has a half-cock notch. Why? Because it makes the double-action stroke shorter and reminds me of my Sig P-220.
I was warned that the roll over of the 2nd Gen S&W's was not as good as the 3rd gens (which the 1006 and 1066 are). I was given three sears to attempt to compensate for it: #2, #4, and #6.
The #4 is what the pistol had in it and the DA with the new hammer was HEAVY.
The #6 actually had the best DA and SA pulls BUT the break was HARD.
The #2 was the best compromise but the rollover was still noticeable.
I pulled it out and went back to the original hammer. Interestingly, I also tried my four different sears. The best and worst overall triggers went to the #4's (one was really nice and the other terrible catch on break).
Ok, here is some info mainly for me but may be of interest to S&W 10xx fans. I wanted to put a lot of the 10xx info together in one place. These have been compiled from various sources available on the internet.
FBI 1076 Training Manual (pdf):
FBI Adoption Report:
So, the 1006 is a little long so I thought I would make it a 1066. :)
The 1006 has a 5" barrel while the 1066 is 4.25". Other than that the pistols are identical, but it changes the balance quite a bit and is obviously more carryable.
Notice the shorter slide length in front of the dust cover.
UPDATE: 10/08/2011 more pics moved from Flickr and are available in this post:
My new (to me) 1006
Well, it is from a 1006 (but not the mint one I just got). More on this one to come but here is a pic of the bubbled part which (I think) is causing the trigger to slightly catch in SA mode. Luckily, the reset is super short so one would never notice it during normal firing. However, since I have a mint 1006 next to this one to compare it was noticeable. Playing with the trigger play spring is how I noticed...So, what is this part and since it is catching on the frame, could it cause the famous 3rd gen SA trigger click? I think maybe..
What is interesting is that this 1006 is a former PD pistol and I suspect it has clicked/stuck from day 1!
02/20/2011 - This part was replaced and appears that although it caught slightly it was not the cause of the clicking. I will do a complete write up on putting back together 1006 #2 shortly.
So, my first experience with the 1006 was in 1990 on a rental range. My girlfriend at the time absolutely loved it. I fell in love with the round but not the pistol -- it was big, bulky, and heavy. It was a double-action/heavy first shot with a single action in which the trigger moved dramatically towards the frame. The safety was on the slide and worked the opposite of what I thought it should. It had plastic grips and a magazine disconnect. It was also very expensive. You see, I had just recently bought my first handgun (and one that I would carry for years to come) a Springfield 1911. I still have it and pics are on this site. It was chambered in 45ACP because it was $100 more for the 10mm version and the ammo was harder to come by and more expensive. I always thought I could get the 10mm linkless version later. Little did I know.
Enter 20 or so years later. I have come to appreciate some of those "negatives" I used to disdain. I have been looking for a 1006 locally for some time. I had seen a total of two. The first one I lost because I waited for the next day to buy it. The next one the buyer decided not to sell. However, I got a phone call from my local shop asking if I still was looking for one and they had got a LNIB in trade. They put it aside for me and I got it.
I couldn't be more pleased. I still love 1911's but what the heck was I thinking back then? This pistol was far ahead of its time. And it is a tank -- by far the heaviest duty 10mm that I own (ok, my other two are 1911's).
Let's start with some pics...You can click on each one for the full view. From top to bottom left to right.
1. 1006 barrel close up - maybe the former owner shot a box or two through it.
2. Box - inside was the manual, sight adjustment tool, cleaning rod and brushes.
Product code puts it at a 1990-1 manufacture.
3. Closeup - Pics don't do it justice. My wife was surprised at how big the pistol is.
4. Feed ramp close up - remember these came out in 1990!
5. Strangely, I got one yellow follower mag (probably original) and one of the newer white follower mags with the "improved" accuguide improvement to hold the rounds from moving forward from recoil.
6. Slide to frame fit - remember this is production pistol from 1990!
7. Left side
8. 9 shot mags stood up
9. Some features ahead of their time in a production pistol. From left to right: front strap serrations (still a mainstay on S&W 1911's), undercut trigger guard (something pistols even today could learn from), checkered trigger guard
10. Side shot with slide locked open
11. Guide rod tube - this is included because a lot of Colt fans seem to think/complain if the wall thickness is not completely symmetrical. If you look REALLY close it is a little off. LOL
12. Rear sight closeup - fully adjustable with huge side shields. I like them and the way they look.
13. Reassembly wackiness - So, here is one thing that seems wacky: The hammer is cocked during disassembly (because the slide is pulled back). But, to put it back together you have to press down on three levers (I attempted to take a fuzzy picture to show, but neglected to focus). Anyway, one of those levers decocks the hammer. You then have to hold the three levers down to pull the slide onto the frame. Seems odd.
14. Guide rod and recoil spring assembly - the end is actually a spring loaded buffer. Neat.
15. Right side
16. Recoil rod fits into that notch. Does it look a little small and that you should be careful and hold onto the rod/spring while dis/assembly? It is.
All in all a beautiful pistol and probably the toughest (former) full production 10mm from a major manufacturer and I am glad to have one, but sad that it took me so long to appreciate it.
08/10/11: Pics moved off of Flikr.
It seems that a lot of folks are not familiar that Springfield made a number of 10mm 1911's include a linkless.
I wasn't $-savy enough to buy one at the time but I did get some neat literature in my 45 that I bought in 1990. Incidentally, Springfield also built the dual-extractor Omega and a standard link 1911 in 10mm.
I bought 3 Chip McCormick (9rd) 10mm magazines from MidwayUSA for my Dan Wesson CBOB. All of them experienced intermittent slide lock after shooting round #8. I should have just bought standard 8 round mags.
Before you ask, yes I did try different brands of ammo and the pistol functions flawlessly with the stock 9rd DW mags (actually made by CheckMate for DW). The stock mags, incidentally, feel heavier duty and have a stiffer spring.
Here is a pic of what happens. The follower rides too high and catches the slide lock. I suppose I could have bent it to work, but 10mm ammo is not cheap, and I would rather pay more and have something that works. I ordered a couple more mags from DW, and guess what they actually work.
Well, I am glad that MidwayUSA has a great return policy. Spend a little more and get a good mag.