Trouble seating gas checks ? ?
- Thread starter Ben
- Start date
CWLONGSHOT
Well-Known Member
This is why I love this NOe seater so much..
There where fired over the weekend at 16-1700 fps thru wet news print @ 50 yards.
They are the NOE 360-181 W/deep HP cast in 20:1. (Where supposed to be a COWW test but well I fudged up) Recovered weight was about 90g 175 was starting weight.
As you can see all gas checks STAYED ON!!
CW
There where fired over the weekend at 16-1700 fps thru wet news print @ 50 yards.
They are the NOE 360-181 W/deep HP cast in 20:1. (Where supposed to be a COWW test but well I fudged up) Recovered weight was about 90g 175 was starting weight.
As you can see all gas checks STAYED ON!!
CW
Ian
Notorious member
That's pretty good CW.
I use a Lyman 45 to seat checks but never force them. First I snap the check on the base and then seat/crimp in the 45 before moving over to the press for final sizing in a Lee-type die.
If your checks have to be forced on they will plow up a ring of lead and be eccentric to the bullet body, guaranteed.
If the check is too tight to fit the shank either expand it, custom make your own checks, or get a properly made bullet mould. The only reason I "seat" gas checks is to crimp them on the shank under pressure using the tapered entrance of an H die.
I use a Lyman 45 to seat checks but never force them. First I snap the check on the base and then seat/crimp in the 45 before moving over to the press for final sizing in a Lee-type die.
If your checks have to be forced on they will plow up a ring of lead and be eccentric to the bullet body, guaranteed.
If the check is too tight to fit the shank either expand it, custom make your own checks, or get a properly made bullet mould. The only reason I "seat" gas checks is to crimp them on the shank under pressure using the tapered entrance of an H die.
I just made the GC shank a couple thous. smaller and no problem snapping them on. No evidence that they come off when shooting. I do use the anvil part to insure seated square before size/crimp with flat top punch. Sometimes the base has some minor flash that would make the seating crooked.
L Ross
Well-Known Member
Here are a couple of photos of my gas check flaring set up. This is a joy to use. I have flared just about every .30 caliber check I have on hand. I am down to flaring the old Lyman checks,
from the 1970's I believe. Funny thing about them, they fit so perfectly on Ian's flaring tool that they trap air and some of them audibly "pop" off when I raise the ram.
from the 1970's I believe. Funny thing about them, they fit so perfectly on Ian's flaring tool that they trap air and some of them audibly "pop" off when I raise the ram.