9mm help!

[jbrch378]

I'm loading 9mm for a cz 75b. I'm using a 115gr. lrn from MBC and Bullseye powder. It's hard to find data on this combo. Also the throat on my cz 75b is shallow so I have to use a short oal. I was wondering if this sounds ok :

115 gr. lrn
4.1 gr. Bullseye
OAL 1.060 - 1.062


Any and all feedback with be helpful. Thanks.

[buyobuyo]

Lyman 49 lists 3.4 - 4.2 gr for Bullseye with a 120gr lead bullet at 1.065".

[jbrch378]

maybe I should back the charge down a bit then. thanks

[9.3X62AL]

Round nose boolits are the "default setting" for self-loading pistols, esp. for those pistol designs that generally didn't feed cast boolits or hollow-points readily back in The Olde Dayz. My own preferences are for truncated cone designs in autopistols, with the boolit seated with about .020" of the front drive band exposed above the case mouth. This will almost always relieve the shooter of worries about short throat/bullet interferences, and with most bullet designs optimizes feeding as well. TC designs place more the bullet's surface in contact with the grooves and bore, which facilitates grip in the insanely-fast twists many 9mm barrels feature, and also gets a substantial portion of the bullet base out of the case.

I use fairly hard alloys (92/6/2), fairly soft lubes (Javelina Alox/Beeswax), and STRICT adherence to throat diameter of my 9mm barrels. If this sounds a whole lot like I'm making rifle cast boolit loads, you're correct. 9mm, 10mm, and 40 S&W are basically short-barrelled rifles in the context of cast boolit shooting. Ditto the 38 Super.

[Larry Gibson]

I use 4 gr Bulleye as a standard "go to" load with 115 - 124 gr cast bullets in the 9mm. I use the Lee 356-120-TC in my own CZ75 over that with great accuracy. I size at .358 BTW.

Larry Gibson

[canyon-ghost]

I've been using the Lyman 125 grain Devastator mold (hollowpoint). Between two of us in chat we narrowed it to 3.2 grains(mine) through 3.8 grains (Kevin's load) for the S&W 5906. Both using Bullseye for cast, of course. When you use a short OAL, the same as the Lyman mold of mine does, you increase pressure in the tiny 9mm case.

But, all in all, even 3.2 grains of Bullseye will operate an autoloader.

Ron

[vincewarde]

I would be careful with overall length in the 9mm. Pressures can increase rapidly as you seat bullets deeper.

[skyfire1]

I have had luck using mbc 115 LRN with 4.3 gr of bullseye with col of 1.123. Accurate but a little smoky. Overall very Please with them.