Has anyone used a bushing bump die for several loadings on the same cases? Just wondering how many times one can use these dies before having to full length. I have several of these dies but havent put them to extensive use yet. Has anyone experienced donuts or any other issues?
Forester bushing bump die
- Thread starter 1holeaddict
- Start date
I think this thread relates to your question:
http://forum.accurateshooter.com/index.php/topic,3772521.0.html
Some folks seem to have success not F/L sizing each time but the overwhelming majority report doing better with it. If I don't F/L each time it only takes a couple loads before the round won't chamber easily and then when I do resize it is much harder to squeeze the base/web back in as noted by the harder pull needed on the press but when F/L resizing each time I don't go through the cycle and things are more uniform load to load. Apparently there has been a recent change in thought on neck sizing only that goes against conventional wisdom of just a year or so ago.
http://forum.accurateshooter.com/index.php/topic,3772521.0.html
Some folks seem to have success not F/L sizing each time but the overwhelming majority report doing better with it. If I don't F/L each time it only takes a couple loads before the round won't chamber easily and then when I do resize it is much harder to squeeze the base/web back in as noted by the harder pull needed on the press but when F/L resizing each time I don't go through the cycle and things are more uniform load to load. Apparently there has been a recent change in thought on neck sizing only that goes against conventional wisdom of just a year or so ago.
Never used the Forster but i've converted a couple Redding neck dies to shoulder bump.
More accurately I converted my shellholders to allow shoulder bump with redding dies
It will depend on the brass and hotness of the loads used.
I used bump only dies in a 204R for a couple of years using sane loads.
Cross the threshold radically to see "whats way up there" and the web area will expand enough that FL will be required.
I FL everything everytime now. Loads change subtely from necksizing but accuracy and consistency improve. So if you have accurate loads dialed in with necksized brass and they do not perform as well as FL don't judge on that alone. Tweak it a bit.
I usually find I need to increase powder just a touch for FL brass. Might go against conventional wisdom but thats my expierience.
My theory is the effort required to expand the brass must be compensated for to bring it back in tune.
More accurately I converted my shellholders to allow shoulder bump with redding dies
It will depend on the brass and hotness of the loads used.
I used bump only dies in a 204R for a couple of years using sane loads.
Cross the threshold radically to see "whats way up there" and the web area will expand enough that FL will be required.
I FL everything everytime now. Loads change subtely from necksizing but accuracy and consistency improve. So if you have accurate loads dialed in with necksized brass and they do not perform as well as FL don't judge on that alone. Tweak it a bit.
I usually find I need to increase powder just a touch for FL brass. Might go against conventional wisdom but thats my expierience.
My theory is the effort required to expand the brass must be compensated for to bring it back in tune.
NorCalMikie
Gold $$ Contributor
15 to 20 firings and still going strong using the Forster Bushing Bump die. Neck size, bump the shoulder maybe .001 to .002, throw in a body size (body only die) when the case starts getting snug on bolt closing.
And on my BR cases, by switching bushings I'am able to size different caliber brass in the same die. (20, 22, 6mm,6.5, 6.8, 30 and 7mm)
I'am not a fan of full length sizing except on my gas guns. Survey says: Whatever works best for me is what I use.
And no expander balls either.
Good thing we don't all think the same.
And on my BR cases, by switching bushings I'am able to size different caliber brass in the same die. (20, 22, 6mm,6.5, 6.8, 30 and 7mm)
I'am not a fan of full length sizing except on my gas guns. Survey says: Whatever works best for me is what I use.
And no expander balls either.
Good thing we don't all think the same.
We need to be careful using the term FL sizing. Some of the people who espouse FL sizing every time are shooting custom chambers with very close tolerances. My 30 BR has such a "perfect" chamber that it could literally be reloaded without even sizing the brass. The FL sizing die was made by the gunsmith and barely touches the case .001".
I doubt that brass fired in a factory chamber, which can be anywhere from .006" to .010" oversize at all points, could last through more than a few resizings.
That being said, my .223AI and 6BR (3 barrels) brass, in nice custom chambers, have never been FL resized in years of shooting and annealing and thousands of rounds.
I doubt that brass fired in a factory chamber, which can be anywhere from .006" to .010" oversize at all points, could last through more than a few resizings.
That being said, my .223AI and 6BR (3 barrels) brass, in nice custom chambers, have never been FL resized in years of shooting and annealing and thousands of rounds.
I have 3 guns built by Bobby Hart 223, 30-06,6ppc and they all will digest neck sized casings all day. Have never full length sized for any of these guns. On the other hand i have 3 Savage model 12's in 6br and if i dont bump the shoulder the bolt closes hard. I also have several other guns in 243 and 7mm mag that are factory guns that have been accurized and will take neck sized cases.
Reed
I've FL sized brass in sav 204R's more than 25 times per case using a Redding S series.
Annealing the necks is obviously required in factory guns ;D
Only reason I threw away that brass is I clean primer pockets with a uniformer and it tends to remove a little brass each time using warm loads. I was afraid of blowing out a primer pocket.
I have 200pcs of Laua 308W brass I purchased in 2006. Four 308W barrels that all use that same brass thanks to Savages barrel nut which allows me to set my own headspace. No idea how many times that brass has been FL sized but its over 25. Once again, annealing is a given.
In my expierience the only time FL sizing causes problems is when in experienced shooters follow the dangerous generic one size fits all instructions that come with the die. YMMV
I've FL sized brass in sav 204R's more than 25 times per case using a Redding S series.
Annealing the necks is obviously required in factory guns ;D
Only reason I threw away that brass is I clean primer pockets with a uniformer and it tends to remove a little brass each time using warm loads. I was afraid of blowing out a primer pocket.
I have 200pcs of Laua 308W brass I purchased in 2006. Four 308W barrels that all use that same brass thanks to Savages barrel nut which allows me to set my own headspace. No idea how many times that brass has been FL sized but its over 25. Once again, annealing is a given.
In my expierience the only time FL sizing causes problems is when in experienced shooters follow the dangerous generic one size fits all instructions that come with the die. YMMV
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