Ideal .40 cal weight.

Discussion of BPCR loading techniques, SAFETY, Case Cleaning and Prep, Indexing, BP Choice, Primers, Wads, Compression, Drop Tubes, Vibration, Load Testing, etc.
Plainbase
PostsCOLON 127
JoinedCOLON Thu Nov 24, 2005 11:26 am
LocationCOLON Out West

Re: Ideal .40 cal weight.

Post by Plainbase » Thu Oct 05, 2017 12:02 pm

When starting out with my 16 twist (Badger) Browning BPCR I found the pointy Lyman to have excellent accuracy - at short ranges on calm days. When the winds got squirrely at 375 and 500 meters so did the groups. Switched to a 400 grain NASA II from Old West Bullet Molds and all was well. I ran extensive alloy tests with a Lyman Snover at 300 and found that 1 to 25 was much more accurate than 1 to 30 and that 1 to 20 was more accurate than 1 to 25. My match load is 53 grains of Swiss 1.5 using Federal LP Match primers with a tissue paper underpowder wad and a .060 overpowder fiber wad. Lube is SPG or White Lightning. Compression is essentially zero. Wiping is one slightly damp patch on a nylon brush with a quick bore mop drying of the chamber. With my 38-50 I use a 360 grain Paul Jones micro mini in 1 to 16 (long noses can slump at 1 to 20 causing flyers) and 51 grains of Swiss 1.5.
Plainbase

Kurt
PostsCOLON 658
JoinedCOLON Mon Nov 21, 2005 8:05 am

Re: Ideal .40 cal weight.

Post by Kurt » Thu Oct 05, 2017 4:53 pm

Singleshot S.A. wroteCOLON
Fri Mar 24, 2017 6:21 pm
I would like to get myself a genuine tapered BS bullet sooner than later, but what weight.??
Is 400 grn about right ? Or a tad more, 400 - 425.
All suggestions appreciated, as usual. Thanks, SS S.A.
I would think more about the length and ogive profile then just the weight. You can have a 1.350" long bullet weigh more then a 1.460" just by the way the ogive is and for the 1/16 ROT barrel. There is a point where the bullet can get to long to stay stable at extended ranges. The long elliptical or "money" bullets get a little squirrely in a 1/16 ROT when the winds kick up.........Kurt
"Complaining about a problem without posing a solution is called whining."
Teddy Roosevelt.

Singleshot S.A.
PostsCOLON 97
JoinedCOLON Sun Aug 30, 2015 6:19 pm
LocationCOLON Adelaide. Sth Oz.

Re: Ideal .40 cal weight.

Post by Singleshot S.A. » Thu Oct 05, 2017 5:19 pm

Thanks again guys,

Slowly slowly taking this in now.

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