Q: How can you seat and crimp in separate steps when using a 3 station progressive press?
A: By using resized/primed cases
Q: How can you reduce shell plate tilt/deflection on a rotary progressive press which may affect variation in OAL/COL?
A: By using resized cases
Q: How do you calculate bullet seating depth to determine whether you will compress the powder charge or not?
A: Subtract bullet length from cartridge length and subtract this number from case length. Then measure down final number from case mouth using the end of the calipers to the top of the powder charge.
Q: What determines maximum OAL/COL for a semi-auto pistol cartridge?
A: Barrel's leade/free bore and the start of rifling
Q: How do you determine the working OAL/COL for a semi-auto pistol cartridge?
A: By manually feeding and chambering from the magazine and releasing the slide without riding it (starting with the maximum OAL/COL and incrementally decreasing until the dummy round reliably feeds/chambers from the magazine).
Q: Can the working OAL/COL ever be longer than the maximum OAL/COL?
A: No but the working OAL/COL can be the same as maximum OAL/COL.
Q: What is the hardness of Glock barrel's surface compared to typical pistol barrels like KKM?
A: Older European process produced 68 Rockwell C hardness and newer USA process produces 64 Rockwell C compared to 42-45 Rockwell C for KKM barrels -
http://www.kkmprecision.com/shopping-cart/?func=order&frompage=cat&cat=G
Q: Which barrel twist rate is faster between 1:10 vs 1:16?
A: 1:10
Q: What are the barrel twist rates for these barrels? Glock, Bar-Sto, KKM, Lone Wolf, Storm Lake, Wilson Combat:
A:
Glock - 1:9.84 for 9mm/40S&W/10mm, 1:15.98 for 357Sig, 1:15.75 for 45ACP/45GAP
Bar-Sto - 1:16
KKM - 1:20
Lone Wolf - 1:16
Storm Lake - 1:16
Wilson Combat - 1:10 for 9mm/40S&W, 1:16 for 45ACP
Q: What factors make Glock barrels less suitable for lead bullets?
A:
- Fast barrel twist rate (1:9.84 for 9mm/40S&W/10mm compared to typical 1:16/20)
- Very smooth and rounded rifling (hexagonal for 9/357/40/10 and octogonal for 45 caliber)
- Very smooth start of rifling
- Longer leade/free bore (than some factory/aftermarket barrels that are better suited for lead bullets)
Q: Will Lee Pro Auto Disk powder measure drift after a 5,000-10,000+ round reloading session?
A: No. Pro Auto Disk uses fixed volumetric disk holes that cannot "drift"
Q: What types of reloading presses are there?
A: Lee "Whack-A-Mole" classic loader, portable/hand type single stage, C and O type single stage, arbor type "benchrest" single stage, H type multiple station, Turret, Progressive turret (3/4 station), Progressive rotary (3/4/5 station), Commercial inline and rotary (Ammo Load/Camdex)