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ORIGINAL: 270BBR
My reloading books are old, could someone tell me if the 6.5 mm bullet can be use to load the Remington 260 or is the 6.5mm bigger.

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ORIGINAL: 270BBR

My reloading books are old, could someone tell me if the 6.5 mm bullet can be use to load the Remington 260 or is the 6.5mm bigger.

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To convert MM to CAL.>multiply MM by .040
To convert CAL. to MM> Divide by .040

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ORIGINAL: Vapodog

While this is generally a correct statemnet one can be very confused by this.....for example the correct multiplier is not .040 it's .03937
Then it gets worse.....for example a 7MM bullet should be 7 X .03937 = .27559 and a real 7MM bullet is .284
Another example.....a 6MM bullet should be 6 X .03937=.23622 and it's really .243

I believe this is from the European bore diameter for the rifle bore prior to rifling.....not actual bullet diameter.

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ORIGINAL: Rebel Hog

Vapodog, I just rounded off the figure to make it simple.
The 9 is over 5 so makes the 3 a 4
The 7 is over 5 so makes the 3 a 4
If you multiply 7mm x .040> .280 cal
If you divide .280 cal by .040> 7mm
My statement was CALIBUR not DIAMETER....
Actually your figure would be .044................ .044 the 4 is under 5, so drop the 4>>.040
6.5mm x .040>>.260

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ORIGINAL: Rebel Hog

Briman,
I am not quoting diameter, I am quoting Calibur.

8mm x .040> .32cal
7.62mm x .040> .31cal
.30cal / .040> 7.5mm
.243cal / .040> 6mm
6mm x .040> .24cal

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ORIGINAL: Vapodog

While this is generally a correct statemnet one can be very confused by this.....for example the correct multiplier is not .040 it's .03937
Then it gets worse.....for example a 7MM bullet should be 7 X .03937 = .27559 and a real 7MM bullet is .284
Another example.....a 6MM bullet should be 6 X .03937=.23622 and it's really .243

I believe this is from the European bore diameter for the rifle bore prior to rifling.....not actual bullet diameter.

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