Not sure you mentioned it but the CBTO will be different for different bullets - e.g., Berger versus Sierra, and for same make of bullets but different grain weights. I remove the primer from the fire formed case to remove any pressure before measuring.
The way I do it is while the barrel is removed. I seat a bullet long and slide it in the chamber barrel while the barrel is vertical. The lands will grab the bullet and I feel resistance when removing with my fingernail. Then seat it deeper and repeat until I not longer feel the resistance. Then I know where the touch of the lands are and that is my “zero” length for load development.
hello... personally it's a waste of time to select them by weight (I don't see differences at 1000y). but if in total length and diameter, there I have been able to see demonstrable differences... regards...
Thanks for the advice. I am going to sort by base to ogive next. I mainly sort by weight first to find the extreme outliers and use those for sighters.
I don’t measure base to tip, I only sort by base to ogive. Base to ogive gives me consistent seating depth. I agree, base to ogive is all that matters. The only time I measure to the tip of the bullet is case base to tip (OAL) and only use that measurement when comparing to what other shooters are doing and even then, it is only a reference since there is such an inconsistency with the tip length. CBTO is not a good comparison to other shooters since there is a significant variation between comparators.
Not sure you mentioned it but the CBTO will be different for different bullets - e.g., Berger versus Sierra, and for same make of bullets but different grain weights. I remove the primer from the fire formed case to remove any pressure before measuring.
I agree, different CBTO measurement different bullets and grain weights. Good observation. Thanks for the comment.
The way I do it is while the barrel is removed. I seat a bullet long and slide it in the chamber barrel while the barrel is vertical. The lands will grab the bullet and I feel resistance when removing with my fingernail. Then seat it deeper and repeat until I not longer feel the resistance. Then I know where the touch of the lands are and that is my “zero” length for load development.
That sounds like a sound and repeatable method. I’m going to try that method next time I take the barrel off and compare to Alex Wheeler’s method.
@@targetrifle I got the method from Speedy Gonzalez. In this video. ruclips.net/video/AFiIuzvgHYc/видео.htmlsi=hVbUDw93UUc0jmxU
hello... personally it's a waste of time to select them by weight (I don't see differences at 1000y). but if in total length and diameter, there I have been able to see demonstrable differences... regards...
Thanks for the advice. I am going to sort by base to ogive next. I mainly sort by weight first to find the extreme outliers and use those for sighters.
....why would you measure base to tip/overall length of bullet after measuring base-ogive which is all that matters.....
I don’t measure base to tip, I only sort by base to ogive. Base to ogive gives me consistent seating depth. I agree, base to ogive is all that matters. The only time I measure to the tip of the bullet is case base to tip (OAL) and only use that measurement when comparing to what other shooters are doing and even then, it is only a reference since there is such an inconsistency with the tip length. CBTO is not a good comparison to other shooters since there is a significant variation between comparators.