Reloading 40 S&W for Browning HP

[velocette]

Gentlemen;
I have been trying to reload for my .40 S&W BHP. This pistol with Winchester 180 gr. JHP factory ammo shoots nice little groups right on POA. With my reloads, it shoot patterns, I mean big patterns. I've been reloading for over 20 years and have managed to work up some really good loads for my rifles, revolvers and other pistols. (good enough to get me to master class in NRA Bullseye competition) This one is givng me fits.
Cast bullets mike at .401, factory at .400. Powder charges have been up and down the range with Bullseye and Unique. I've tried 130 grain, 150 grain and 165 grain cast & 150 grain JHPs with similar results, that is poor.
Do any of you have a pet bullet / powder combination that gives good accuracy in your .40, preferably a .40 BHP?

Roger

 

[slpmmp]

Hi, I've been using Titegroup 4.2 grains with laser cast 180 grain bullets and it shoots POA and groups small ragged holes. This is the lowest load I can go with the hi-power since it's so tight of a gun, but with my M&P i've been able to go down to 3.5 and still have the gun function 100%. Hope this helps. I don't use either of the other powders you use. I've only used either titegroup or VVN320 in my guns.

 

[oldgold]

I've had good results with 231 and 165gr cast. Don't have a High-Power in forty but It gives great accuracy in my TZ and XD.