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Full length sizer bushings

ACF

I got a full length bushing sizer from Widden for my 22 CM and can't seem to get bushings from them that are the proper sizes. I bought 5 and 3 were not the sizes that they were marked. Sent the 3 back and got 3 more that weren't the sizes marked on them.

These were measured using gage pins and an inside micrometer ( not a caliper) so it is not an error in my measurements.

I can't find the thread that mentioned the inter-changeability of other makers bushings, could someone refresh my memory.

I've wasted $70 and $8 to send these back and have 2 that will work, so I'd like to try somebody else's bushings, IF THEY ARE MADE TO THE PROPER SIZE.

Thanks,
Chris
 
I have never measured mine, as my gage pins are in .001 increments , which is too big of an increment to measure a hole that should be within .001. I also don't own an inside micrometer, so I use them as they come.

Since bushings come in .001 increments, do you mean that (for example) a bushing marked .245 measures over .246, or under .244 ? Or were they mis marked, and really way off size? I do not know the tolerance on bushings, but I would ( based on absolutely no information) expect a given bushing to measure within .0005 of the marked size. I hear that there are bushings that are available in .0005 increments.

Typically, you measure a loaded round and subtract .002 and order that sized bushing. With unturned necks, neck wall thickness can vary a lot, and is probably the largest variation in the "neck tension". A bushing a few .0001 off, will not make any difference, and you can use it , as the results will be consistent.
 
If a bushing is .001" or so small it really isn't a big deal. Dont think a person could ever shoot the difference. You'll be able to see results on paper more with tuning bullet seating depths than you ever will with adjusting neck tension a thou or two.

I would think that you probably want the bushings .001"-.002" small anyhow so the the neck ends up at the proper diameter after spring back in the brass. Even if you anneal every firing, you'll still have at least .001" spring back.
 
Not saying it ain't possible, but as mentioned earlier it is hard to measure with pin gauges if yours are not in tenth increments.
 
Mine put the neck exactly what the#s say.
6mm. .268, .267 & .266
I think rcbs ....
 
All the bad bushings were oversize by .001-.002. I order a specific size for a reason, so I want that bushing to be of the correct size.

I would mic the ID of .245 bushing and read .2465 so I would take a .245 (plus) gage and a .246 gage and they both fit through the hole, so it is more than possible that the bushing
is oversize, it is a fact.

If when making a .245 bushing and it comes out at .246, why don't you just mark it .246. Is this telling me we don't check the final size of the bushing, or we don't care about the final size?

I would have checked the replacement bushings for size before sending, but that didn't happen.


I also was bothered by the fact that the threaded part of the die that holds the bushing in was all chatter on the OD threads. If my threads looked like that I would scrap them and start anew.

I thought I was buying some quality products here, but I guess I was mistaken.

Chris
 
Unfortunately, I've read of the same experience with that Name Brand. I'd hate to see another good name go the way of PT&G.
Somebody ain't doin their job.
 
ACF said:
I got a full length bushing sizer from Widden for my 22 CM and can't seem to get bushings from them that are the proper sizes. I bought 5 and 3 were not the sizes that they were marked. Sent the 3 back and got 3 more that weren't the sizes marked on them.

These were measured using gage pins and an inside micrometer ( not a caliper) so it is not an error in my measurements.

I can't find the thread that mentioned the inter-changeability of other makers bushings, could someone refresh my memory.

I've wasted $70 and $8 to send these back and have 2 that will work, so I'd like to try somebody else's bushings, IF THEY ARE MADE TO THE PROPER SIZE.

Thanks,
Chris
Click to expand...

Well

Personally i am just looking for a bushing that gets me the consistent neck tension i am looking for. Those numbers on the bushing are just another reference datum.

When i am really refining my neck tension i break out.my k&m mandrel kit in 0.0005 increments. A mandrel works so much better than a bushing for that. All the inperfections in the neck are pushed to the outside leaving a nice smooth surface for seating the bullet.
 
Yeah if you read a reamer print, most designs show no taper in the neck. Only the body. So neck bushings shouldn't have a taper either.

Exhibit 'A': reamer print on my 300 NMI, .339" Neck

Screenshot_20190411-125621_Gallery.jpg
 
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