foxmeadow
Member
I ran across a reference to ".020" CRTO" Anyone ever use that term? I'm guessing it refers to free travel like "cartridge rifling to ogive" or something similar.
CBTO...cartridge base to ogive.
That's a lot as far as I know...
Varmint
When measuring your chamber for headspace you need to know from bolt face to shoulder or datum line , knowing the cartridge base to datum doesn't help do anything for sizing headspace for your rifle .
PS: I just realised what you were saying , cartridge meaning bullet base to ogive. The post was for CRTO , I'm sure it was a type o
Are you seating or headspacingI see the term CBTO ( Case Base To Ogive ) is correct , I think of to as Closed Bolt To Ogive is probably the same thing . I found my measurement by using a stripped bolt ( Rem.700 ) with a Go Gauge and shimming up the back of the gauge until I felt a slight resistance . Worked well for me , the gauge measurement is 1.630 my true chamber measurement is 1.632
Agreed.I feel is important first to size the case and know what headspace your working with before seating for a jump or jam .
Thx ChrisJim
I feel is important first to size the case and know what headspace your working with before seating for a jump or jam . People that neck size only are dealing with fired cases with different headspace , only when it comes to a hard bolt lift or chamber can you size down the case to a perfect chamber fit.
Hope things are going well. Be Safe
Chris
Unfortunately, OP seems to have abandoned his own thread. He logged in as recently as yesterday. Hopefully, he'll see fit to rejoin the thread.Thx Chris
I know what CBTO is , I use that for seating,but the op was asking about CRTO .20 , and while everyone seems to be speculating or assuming I chose clarification of an unknown reference from the author.
Good , I always try to answer every person . We are here to sort out problems or find some answer to what question is posted . When someone takes the time in answering a post and the OP finishes with " I'm done here . foxmeadow is a name to remember , it's been a good talk with the rest of you .
Chris
So-o-o, you left us hanging for your own amusement. Not very highroad, but let's just move on, nothing to see here.It was not a typo on my part. .......
What's been fun is watching y'all read what I wrote wrong, assume it refers to cartridge length to ogive (.020")? and generally chew it up and spit it out.
I'm done here...