Checks- To size or not to size?

[Petander]

Those dark purple bullets were coated,then Lee-sized to .359 , then heat treated. I then seated Hornady checks with a Lyman lubrisizer using the seater,checks snapped on, crimped and measured .362.

No neck tension problems loading,I also get a very clean barrel,shooting these from a Rossi carbine with a rough,large bore.

Green and gold bullets were fully sized with the Lyman,checks are measuring .3595 , bullets being .359 (that is a modified 358 die.)

Depending on your glasses,you can actually see the check size difference in the pic. Purple ones look like "scrapers", which they are.

Is there a general rule or reason to size gas checks closer to bullet size?

https://i.postimg.cc/90x3NYTD/IMG-20191127-104348-650.jpg

[swheeler]

Is there a general rule or reason to size gas checks closer to bullet size? If the gas check is too much larger than the bullet it is going to expand the casing/neck and you won't have neck tension.

[vagrantviking]

I'd crimp them all.
As well as the neck tension issue and pain in the butt seating them in the case you might get fliers if they get cock-eyed upon firing. Not too likely but why introduce non standard procedures that could work against accuracy.

[white eagle]

if you don't size them to bullet why use them?

[Winger Ed.]

I seat, crimp, & size all in one stroke, and have good results.

But if that process works for you, its a good idea.

As far as doing the seating, sizing, etc in more than one step:
I try not to make extra work for myself.
I've found that there are plenty of other people more than glad to do that for me.

[Petander]

Thanks everyone. They are all crimped,just not all sized.

Just wondering how much over bullet size everyone else is using them. And why. Gas checks are a new variable to me,I shoot plain base everything. Now this Rossi carbine is giving me unusual leading so I'm giving checks a go here

At least the 362's keep the barrel clean @ 1900 fps. Oddly enough,I have no neck tension or loading problems. Accuracy was normal,no group testing yet though. Breaking claybirds ok @ 75 m.

https://i.postimg.cc/0jX9DN6T/IMG-20191127-124922.jpg

[swheeler]

I guess if it ain't broke don't fix it!:drinks:

[Petander]

I guess if it ain't broke don't fix it!:drinks:

This is also true. I wish I knew the bore size.

[Petander]

This is also true. I wish I knew the bore size.

Now I know. .3566.

https://i.postimg.cc/prBjdhyw/IMG-20191128-125634.jpg

https://i.postimg.cc/SRGZpK4s/IMG-20191128-132522.jpg

[n.h.schmidt]

Man the chamber must be large. None of my revolvers (38/357) will allow a for a bullet even close to that large. Do you get good case life? I would say keep using them as long as you get good performance.
n.h.schmidt

[Petander]

Man the chamber must be large. None of my revolvers (38/357) will allow a for a bullet even close to that large. Do you get good case life? I would say keep using them as long as you get good performance.
n.h.schmidt

I apologize,it was the .3566 GROOVE diameter being miced above,not bore. My bad plus the language barrier. :)

Bore is about .3485- .349, can't mic that one,calipers only.

[Petander]

New Hornady checks are tighter, seated base is .3615 and they snap better,old ones were generally just a little loose with my particular mold/alloy.

Snap is good. Old ones came with a mold I got recently.

https://i.postimg.cc/2yZzJgdm/IMG-20191211-234547.jpg

[maxfam]

Now I need to pass a lead boolit down the bore of my Rossi 92 and measure.