Identifying Bullet Caliber

[flyfisherman]

From left to right in photo:
Boxes are marked: 240 Grain, 230 Grain, 200 Grain, 250 Grain
How do I identify the caliber?
Thanks in advance.

 

[1006]

Measure with vernier calipers.

 

[SOLGardener]

With calipers or a micrometer at the widest diameter. You could get close with a ruler in hundredths or even 64ths.

Harbor freight sells a decent micrometer for cheap

 

[flyfisherman]

Thank you both, 1006 and SOLGardener. I appreciate it.

 

[SpeedyR]

get a cheap set of calipers, but judging by the weights they are probably 44 or 45 caliber. Within 45 caliber, there's technically 45ACP and 45 Colt, with a few variations on actual diameters, as some guns have bores that like a bit smaller or larger bullets. for 45 ACP it's usually .451-452 while Colt is .452- .454. Lead bullets are usually .001 larger than the jacketed bullets for the same gun.

 

[CTS Tactical]

get a cheap set of calipers, but judging by the weights they are probably 44 or 45 caliber. Within 45 caliber, there's technically 45ACP and 45 Colt, with a few variations on actual diameters, as some guns have bores that like a bit smaller or larger bullets. for 45 ACP it's usually .451-452 while Colt is .452- .454. Lead bullets are usually .001 larger than the jacketed bullets for the same gun.

And 44 is .429 diameter.

 

[flyfisherman]

They are .429 diameter/.44 magnum. I measured them today after receiving the above advice. Thanks, everyone.