.40 cal open

For a compensated gun you want the lightest bullets combined with the slowest powder. The lightest bullet that I'm aware of in .40 cal is 135 grains.

Most (if not all - I don't know anyone who's shooting .45 ACP in Open any more) the shooters running open compensated guns run .36 cal (9 mm) bullets in the 115 to 124 grain range.

If you want to shoot a .40 cal compensated gun in IPSC you would be better off to do so in Modified Division.
 
I've done the 40 cal open thing, I didn't at the time or now for that matter want to worry about getting or losing brass like mose 38 Super/9x21/ etc do.
Really doesn't work that well unless pushing the bullet a lot.
I used 155's as that was what I could get consistently.
Yes the compensator can be gotten to work to eliminate the flip but the recoil now goes straight back into the hand and you feel it compared to other calibers.
The best results I was getting was with a lot of VV N350 (7.7 or so grains) with the 155 bullet.
For open I'm going to 9mm major as soon as C.P. gets around to delivering it.
 
I tried it before, and it works great, just a matter of getting the right combination of bullets, powder and comp. vhit 105, 155gr bullet,a 3 port hybrid bbl with a 7 port comp, the nice thing about it , its so easy to get major. you can also try the n350. I was using the gun for 2 yrs and happy with, maybe its just me, but find it less torgue than the 9 family. back home the modified div is popular, so I just installed a comp and c-more
 
There is nothing wrong with 40S&W in a open gun.
I shoot with a guy from Ohio that shoots a 40 in open. I have seen him whip GM's in the state's using his 40 open gun.

The only difference I have found is mag capacity and that means nothing up here in Canada sence we all can only have 10 rounds. If I did not shot in the state's I would build a 40 open gun.
 
its not really a disadvatage, you can get the 170mm mags 23rnds or even the 140mm with 17rnds plus 2, which is enough for the med. stage or speed shoots, in canada then everybody is limited to 10.
 
I love shooting my 45 STI Grandmaster open gun. Old school caliber but it has never failed me. Also have never had a problem with the gun for 3 seasons. It works well with 230 grain bullet and 4.3 grains of Clays and power factoring at 180. It shoots flat and I never loose the dot while shooting. My best split times are in the .11
Since capasity is not an issue in Canada, why not shoot 45 open.
 
Can you tell us why you're considering .40 Open?

That would best lead to more focused answers like -

If you're starting from scratch, there are better options in the .355 bullet diameter.
If you've got 30,000 pieces of 40 brass, you might wanna consider 9X40.
If you just want cheap brass, go 9mm major.
If someone has a smokin deal on a nice looking 40 cal open gun, and you like it - get it.
If you already have a complete open top end in 40 and only need a bottom end, go for it.
etc.
 
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What do most modified shooters use for ammo? Is it mostly .40? I think a Tan modified gun, but used in Open would be fun. If I am correct,...all I would need would be a modified top end....? Since the LC comes with holes for a mount,..I could just mount a C-more....couldn't I?

Actually, the LC2 has a cut slide anyway,....so technically, might only need a ported barrel, and C-more with mount?
 
Can you tell us why you're considering .40 Open?

That would best lead to more focused answers like -

If you're starting from scratch, there are better options in the .355 bullet diameter.
If you've got 30,000 pieces of 40 brass, you might wanna consider 9X40.
If you just want cheap brass, go 9mm major.
If someone has a smokin deal on a nice looking 40 cal open gun, and you like it - get it.
If you already have a complete open top end in 40 and only need a bottom end, go for it.
etc.


I have a Para 16.40 that i only use for IPSC and considering an open gun in the future. I have a single stack that i use for _DPA style shooting that i can use for stardard division.

So, what will i be looking at for cost.?
 
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I have been shooting 9x40, basically a straight wall 357Sig, for a number of year. 15 grains of powder makes a compensator work really well. Brass is cheap as a bonus, currently paying $20/1000. Lots of flexibilities for powder and bullet combinations. In Canada there is no issue with Magazine capacity.
 
If you ever plan to compete outside Canada, then 40 open limits you, probably the reason virtually nobody uses it. If you will only compete/shoot in Canada then 40 open only limits the speed you can go as it will simply not allow 2 aimed shots ( splits) as fast as a tuned 9mm caliber.

Nobody shoots splits faster the about .16 sec and hits anything past 10M by the way, well thats the best I can do anyways.

40 brass is cheaper but 9mm bullets are cheaper than 40, we can reload the brass and if you plan to practice you will use more bullets than brass.

Mike
 
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