40 s&w?

[badgeredd]

Hi guys and gals.

I am going to start trying to get some good loads developed for my Beretta and my Ruger semi pistols. I will pick up a mold with a truncated cone nose eventually. Just haven't decided which one yet. Something 175ish in weigh.

But until that time, I have a Lyman 40143 that cast a fine boolit. Has anyone tried this boolit in the 10MM or the 40 S&W? These are 175.5 grains with lube so I think the weight is a good one and I'd think they'd feed ok, but that remains to be seen. [smilie=1:

Just asking before I get too carried away.:-D

Edd

[jhrosier]

Edd,
That's probably a boolit for the 38-40.
I would cast up a few and try them.
If they don't have to seat so deep as to bulge the cases, they should be OK.
I don't think that the flat point will cause any feeding problems once you have the seating depth figured out as many folks shoot a TC style boolit in the .40S&W.
That being said, the .40S&W seems to go from reasonable pressures to overload pretty easy, so I'd work up from the starting load real careful.

Please post your results. I'm more than a little interested in a boolit that could be used for both calibers.

Jack

[Tn_River_Ratt]

I shoot those 175 boolits in front of 5.0 win231.

[Kuato]

the .40S&W seems to go from reasonable pressures to overload pretty easy, so I'd work up from the starting load real careful.


Watch your seating depth. The 40 seems to suffer the same issues as the 9mm. pressures can go up dramatically if the boolit is seated too deep..

[9.3X62AL]

No experience with Lyman #401403 here, but I do recall in the dim and distant past that the #401403 was used in a pre-cursor to the 10mm cobbled up by Guns & Ammo magazine in the early 1970s. IIRC, they called it the 40 G&A Auto, and it was made by cutting off 224 or 240 Weatherby cases to the proper length (whatever THAT was) and working up loads in either a Browning HP or 1911A1 so chambered (not sure as to that) that drove the castings and the 180 grain JSP for the 38-40 to 1000-1100 FPS. It was touted as THE NEXT BIG THING in defensive autopistol calibers, and before long Norma birthed the 10mm Auto--the only difference being the parent case, which in the 10mm was the 30 Remington.

Same story with the 40 S&W--which is little more than the 10mm adapted to 9mm-based platforms as opposed to the 10mm's reliance on the 45 ACP-based chassis, then toned down a bit ballistically and given a small pistol primer pocket. So far, it has been a pretty successful chambering. Uh, YEAH.

As mentioned above, the 40 S&W shares some of the reloading-related quirks seen in the 9mm Luger caliber. I've had good luck using the Lee 175 grain TC design (conventional lube groove version) with 4.5-4.8 grains of WW-231, and seated so that about .025" of the front drive band is exposed above the case mouth. This works out to 1.135" for me.

Most pistols chambered in 40 S&W have VERY fast rifling twists--another quirk shared with the 9mm. These run around 1-10" or 4 turns/meter. One of the little cast boolit "rules" I live by is that if a pistol and its ammo want to act like a rifle with cast boolits (high operating pressure, quick twists, LOUD report), then they get treated like rifles--relatively hard alloys, relatively soft lubes, and STRICT adherence to dimensional integrity between boolit and barrel/throat. This last can be a real challenge with the 9mm, but not so much with the 40 S&W--the 40s seem to be pretty much "on the money" in my experience, with grooves dead on at .400" and throats between .400" and .401". (This spans about a dozen examples of SIG-Sauer, S&W, Beretta, and CZ pistols). The CZ is among the few makes using a more rational twist rate of 1-16" in their 40 S&W barrels.

Hope that helps.

[badgeredd]

Thanks guys,

You've given a lot of good info. AGAIN! This will get me started.

Edd

[jmbeard]

Let us know how it works out. I also have a 40 and am looking to load some 170 TC boolits for it.

[Kuato]

Hey Edd,

My Lyman 48th has several loads for the boolit you're casting. It has a OAL of 1.125" with the #401043..
Let me know if you need anymore info..

[badgeredd]

Hey Edd,

My Lyman 48th has several loads for the boolit you're casting. It has a OAL of 1.125" with the #401043..
Let me know if you need anymore info..

I HAVE to get myself that Lyman Manual.

Well I cast some 40143 boolits, lubed and sized .401. Loaded up 5 rounds with an overall length of 1/145. Stuck into a magazine and tried them for cycling, SWEET! They cycled well and seem to be decent as compared to 170 grain factory loads. It is too danged cold to get some real accuracy checks but I have a 12"x12" plate hanging in the back yard about 25 yards from my deck. Clang, clang, clang, clang, clang! :-D It seems I can hit the plate with no problem! This is cool. I loaded them with 9 grains of AA#9 which according to the Lee Manual should be on the low side. SO....for those of you that were curious about this boolit in the 40 S&W.....it DOES work.

Edd

[Ben]

badgeredd:

Yes, the 40143 will shoot just fine in your .40 S & W, you might want to take a look at this post :

http://castboolits.gunloads.com/showthread.php?t=30029

[Bret4207]

I bought 2 of the Lee double cav in their 40 cal. Figured I'd see which one I liked better and then buy the 6 banger. Just a thought.