Joined: Dec 2005
Posts: 2,932
Campfire Regular
OP
Campfire Regular
Joined: Dec 2005
Posts: 2,932
I hear folks speak of "bumping" a powder drop when using it? What does this mean? When I use mine, I always tap it a couple times on the side when flipping the lever? I didn't know if this was the same thing. Inquiring minds want to know.
Joined: Jan 2001
Posts: 28,373
Campfire Ranger
Campfire Ranger
Joined: Jan 2001
Posts: 28,373
I use the term to mean hitting the upper and lower stops with a bit of force when working the handle. Not really hard, more like a good firm tap.
Start at 4:55 for the next 15-20 seconds, what he is doing is about how hard I bump it. Fwiw I use an RCBS Uniflow as shown here.
VIDEO
Gunnery, gunnery, gunnery. Hit the target, all else is twaddle!
Joined: Dec 2007
Posts: 10,258
Campfire Outfitter
Campfire Outfitter
Joined: Dec 2007
Posts: 10,258
I do a double bump at the top and bottom. It has just become a habit.
Ed A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever. The worst slaves are those that put the chains on themselves.
Joined: Nov 2005
Posts: 10,365
Campfire Outfitter
Campfire Outfitter
Joined: Nov 2005
Posts: 10,365
Lyman had this figured out years ago on there No 55 when they had a knocker on there measure.
Joined: Apr 2011
Posts: 151,096
Campfire Savant
Campfire Savant
Joined: Apr 2011
Posts: 151,096
Hit it hard on up and down stroke.
Joined: Sep 2010
Posts: 3,997
Campfire Tracker
Campfire Tracker
Joined: Sep 2010
Posts: 3,997
Bump or don't bump. As long as you do whatever you do consistently, you will get consistent results.
I am continually astounded at how quickly people make up their minds on little evidence or none at all. Jack O'Connor
Joined: Jan 2005
Posts: 38,852
Campfire 'Bwana
Campfire 'Bwana
Joined: Jan 2005
Posts: 38,852
Now if you want to really get into the realm of black magic, inquire about "bumping" shoulders.
Not a real member - just an ordinary guy who appreciates being able to hang around and say something once in awhile. Happily Trapped In the Past (Thanks, Joe) Not only a less than minimally educated person, but stupid and out of touch as well.
Joined: Jan 2005
Posts: 38,852
Campfire 'Bwana
Campfire 'Bwana
Joined: Jan 2005
Posts: 38,852
Lyman had this figured out years ago on there No 55 when they had a knocker on there measure.
Knockers are meant to occur in pairs.
Not a real member - just an ordinary guy who appreciates being able to hang around and say something once in awhile. Happily Trapped In the Past (Thanks, Joe) Not only a less than minimally educated person, but stupid and out of touch as well.
Joined: Dec 2005
Posts: 2,932
Campfire Regular
OP
Campfire Regular
Joined: Dec 2005
Posts: 2,932
Now if you want to really get into the realm of black magic, inquire about "bumping" shoulders.
Got this one figured out. Had to figure it out the hard way when I first started loading years ago.
Joined: Oct 2011
Posts: 623
Campfire Regular
Campfire Regular
Joined: Oct 2011
Posts: 623
I do a double bump at the top and bottom. It has just become a habit.
This.
I call it a "tap tap" on each end of the stroke. Different words/same thing - it works consistently.
I think it was in the RCBS instructions, but I lost those 40 years ago.
Joined: Jun 2004
Posts: 44,817
Campfire 'Bwana
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,817
I use a Redding BR-30 and I do not tap, knock, whatever. I grasp the throw handle in such a way to make a slow, high torque back and forth motion. This avoids vibration and bumps when throwing long kernel extruded powders. The handle doesn't stop, it just shears right through.
Joined: May 2016
Posts: 60,286
Campfire Kahuna
Campfire Kahuna
Joined: May 2016
Posts: 60,286
I do the tap, tap....only because I cant break myself of the habit. When I try not to tap, I end up putting a tap or two in there somewhere and the charges get a bit heavier. As said above, consistency is key.
I am MAGA.
231 members (12344mag , 160user , 2500HD , 22kHornet , 10Glocks , 257 roberts , 23 invisible),
2,357
guests, and
927
robots.
Key:
Admin ,
Global Mod ,
Mod
Forums81
Topics1,191,281
Posts18,467,718
Members73,928
Most Online11,491Jul 7th, 2023