J4 jacket weight
- Thread starter JoeDuke
- Start date
bichettereds
Silver $$ Contributor
Is there a specific lot number you’re asking about? The last lot I received was #4431 and they avg about 22.72gr. Ive tried about a half dozen lots and they’ve varied from as light as 22.00 to as much as 23.10. That is J4 .825s only.
Prior to the Capstone Precision buy out, even when ordered 100,000, or, more, per item, I'd get 3-5 Lots - each Lot having a different weight. Receiving only 1, or, two Lots [per item] was good news!
This, I believe is THE REAL reasoning behind the Berger Column bullet: it eliminates a core forming/squirting bottleneck . . . one core and just make bullets at whatever weight the current jacket Lot wants. Yeah, I know the marketing hype . . . it was a smart business move.
The weight tolerance on the [old] J4 spec. sheet for 0.825" long 6mm calls for a "maximum weight variation of 0.20 Gr. within the Lot": there is no specified weight. I doubt that anything has changed. RG
This, I believe is THE REAL reasoning behind the Berger Column bullet: it eliminates a core forming/squirting bottleneck . . . one core and just make bullets at whatever weight the current jacket Lot wants. Yeah, I know the marketing hype . . . it was a smart business move.
The weight tolerance on the [old] J4 spec. sheet for 0.825" long 6mm calls for a "maximum weight variation of 0.20 Gr. within the Lot": there is no specified weight. I doubt that anything has changed. RG
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