CZ75b 40 S&W accuracy

[PistolShooter]

So as the title suggests, i have a CZ75 in 40 cal which i have converted to SAO. The trigger is excellent.
I've never tried loading for top notch accuracy in a pistol until now. I usually make something thats works decent and shoot it but by now I've had enough practice to notice a difference and would like to see how good i can shoot with very good ammo.
I bought some Zero 165 JHP bullets and have tried various charge weights of W231. Today i tested 10 rounds with 5.3 grains of W231 (1040 fps) at 25 yards from a rested position and got a 4" group. I just bought some Titegroup to try. I have some loads made but im waiting for the right day for testing.
I was hoping for better accuracy than 4" but im not unhappy either.
What have been your results? Can better accuracy be had?

[Ruber]

Personally I load heavier bullets and slower powders for my 75B in 40.   I?ve never tested it from a bench, but get better results than that at 25 yards (I always finish range trips with slow fire at 25 whatever I am shooting).

My full sized CZ, FN, and Beretta 40?s all like 180 gr bullets over a slow powder.  Now... my 75B is no longer a ?b? and has some Cajun internals with a very nice, crisp pull, but the CZ should be way better than 4? off a bench with the right load.

[M1A4ME]

If continued load development doesn't give you what you're looking for you might try the CGW barrel bushing.  There is one for the slightly larger OD .40 S&W barrel in the CZ75B (seems like its for the SP01 also???)  Lots of people report their groups tightening up after installing those bushings.

Can't speak about heavy bullet loading/shooting.  I'm still shooting 140 grain Missouri Bullet Co. and 135 grain Nosler hollow point loads in my CZ .40's.  These were for my P07 and shoot pretty good in it.  Not so good in the P09, not so bad in the Tactical Sport and the new CZ75B in .40 I bought a couple months ago just hasn't been shot that much yet.

I do have some 155 (or is it 165??) grain bullets and some 180 grain lead bullets to try in them, just haven't gotten around to loading them up yet.  Also bought some Titegroup power and AA#7 powder to try with those.

[PistolShooter]

I will continue trying different combinations. It takes me a while cause i only go out on weekends and can't afford to have a bunch of different components on hand.
Thanks for you're thoughts.

[Ruber]

Roger that!

I tend to load out of the Hornady manual as components are readily available locally and fairly consistent.  In 40 SW and 10mm, I can switch between their FMJ and XTP fairly reliably. 

In full sized .40 & 10mm, I?ve had best luck with Blue Dot, AA7, and Power Pistol, all of which are good in other cartridges.

I have two loadings I like for 40 SW with both Blue Dot and AA7.  For warm loads, about half a grain below recommended max.  For mild loads, about 1.5 grains below recommended max.

In either powder/bullet, you should be able to get a major pf load at ~1gr below recommended max in the full sized 75b.

Personally for me, the warm load of Blue Dot has performed the best in my 75 (good velocity, low sd, excellent accuracy).  If I was aiming for improving split times, ya, I?d go with a lighter charge of faster powder.

Looking at Brian Enos? forum for .40/10mm loading will give good results.  Many people there are using faster powders, you might get some good W231 recipes off that.

Good luck!

[PistolShooter]

I tried 4.5 and 4.7 of TG with 180 campro bullets today. 4.5 grains gave a large velocity spread and 4.7 improved it though the accuracy of these loads were nothing special. I also tried 4.9 and 5.1 of TG with my Zero 165 JHP bullets and the same thing happened. More powder lowered my velocity spread. I may have to try this load again. It had the best accuracy of all loads today though not to impressive (4"-5" @ 25 yards)
Maybe it was me so i will have to try again

[Ruber]

Hmmn... I?ve seen folks use a similar load of TG with cheap 180gr plated bullets and do very well. 

Some CZ chambers have more or less room than others. I?d check to make sure you are seating the bullets to the right depth for your barrel.

[PistolShooter]

I'm confident in my seating depth of 1.13". Maybe I'll double check just because.

[Ruber]

Not that it helps id the culprit, but how does it shoot some of the more popular commercial factory loaded ammo?

i.e., if factory loads are getting 5? groups, your loads are fine, let?s start looking at the gun...

[skin]

I have never been able to get a 40s&w to shoot well with faster burning powder. I've had stellar performance with slower powders like vvn340 and blue dot with bullets from 135 gr to 180 gr. Great accuracy and top speed.

[M1A4ME]

I have never been able to get a 40s&w to shoot well with faster burning powder. I've had stellar performance with slower powders like vvn340 and blue dot with bullets from 135 gr to 180 gr. Great accuracy and top speed.

Where's the big grin emoji when you need him?

My two good shooting .40 loads are with Blue Dot for the 135 grain bullets and Herco for the 140 grain lead/coated bullets. 

I'd like to find a slower burning ball powder that meters consistently.  Bought that 1 lb. can of AA#7 but haven't gotten around to trying any of it yet.

[PistolShooter]

From 15 yards i can shred the black circle on a B8. This is fine for most of my shooting. Ive been wanting to try power pistol for a while but it just hasn't happened.
Maybe i can find some blue dot. A friend might have some.
Im not interested in buying factroy ammo though that sounds like a good idea. Ive been reloading for so long that factory ammo prices are very hard to swallow.
Also, here in canada, i dont have many options without ordering and paying shipping costs.

[M1A4ME]

Blue dot doesn't meter well through my RCBS Uniflow.  I use a Hornady electronic measure/scale (Christmas present from my wife a few years ago) to meter it for the .40 and 9MM hollow point loads.  Both are compressed loads.  Both are healthy although not close to the published max loads in the reloading manuals/bullet maker on line data.

No way you can double charge one of these.  These are the 9MM cases but the .40's look similar.

[PistolShooter]

Those cases are quite full. W231 and Titegeoup don't do that. I've never double charged anything. It has never been a worry of mine. I use a Dillon 550 to make pistol ammo. It works very nice.

[PistolShooter]

A friend of mine has a pound of Blue Dot for $25. I figure its worth a try. I've only tried fast burning powders aside from Unique. Unique didnt give best accuracy though it did work well.