So, I bought this barrel from a nice guy on here, and its a sweet one too. I was going to start the load work up process and I noticed the chamber seems to have been cut different than my last 308 barrel that BMP did for me.
Distance to lands (175smk)-BTO- 2.20 (it actually seems to be under that, I had to push the bullet much harder than I normally do to get that number).
My previous load had a BTO of 2.260"(with 20 or 30 thou jump I think) and it was pretty good for the 175gr SMK that I like to shoot. So, I guess what I'm asking is this.
If the chamber were at 2.300" that would give me a COAL of right at 2.87 with no jump using that smk175 (which I definitely would jump,) but it should also allow me to be at the lands for a similar sized VLD or something I think...
Is this chamber just set up to run smaller bullets? To get my speed without pressure issues, I'm going to need more Freebore if I want to run 175gr smk again, right? So I just need to send it to a competent Smith to cut my chamber to work with my 175-185gr preffered bullet right?
What about the neck size area of the chamber? What size would I want that to be with lapua brass? Or do I just need go measure a bullet in a case and go what .002"-.003" beyond that, more? ---- I should also add that I want to use a bunch of federal brass I got for loading and stock piling to shoot out of this gun, for ammo that I'm not so worried about picking up my brass or the uh oh ammo pile.---
I've been reading a good bit and found some info in accurate shooter but I'm not certain about a few things so I thought I'd ask here. Did t see any threads here that nail this particular thing down but if I missed it, point me that way and I will read em. Thanks guys.
Distance to lands (175smk)-BTO- 2.20 (it actually seems to be under that, I had to push the bullet much harder than I normally do to get that number).
My previous load had a BTO of 2.260"(with 20 or 30 thou jump I think) and it was pretty good for the 175gr SMK that I like to shoot. So, I guess what I'm asking is this.
If the chamber were at 2.300" that would give me a COAL of right at 2.87 with no jump using that smk175 (which I definitely would jump,) but it should also allow me to be at the lands for a similar sized VLD or something I think...
Is this chamber just set up to run smaller bullets? To get my speed without pressure issues, I'm going to need more Freebore if I want to run 175gr smk again, right? So I just need to send it to a competent Smith to cut my chamber to work with my 175-185gr preffered bullet right?
What about the neck size area of the chamber? What size would I want that to be with lapua brass? Or do I just need go measure a bullet in a case and go what .002"-.003" beyond that, more? ---- I should also add that I want to use a bunch of federal brass I got for loading and stock piling to shoot out of this gun, for ammo that I'm not so worried about picking up my brass or the uh oh ammo pile.---
I've been reading a good bit and found some info in accurate shooter but I'm not certain about a few things so I thought I'd ask here. Did t see any threads here that nail this particular thing down but if I missed it, point me that way and I will read em. Thanks guys.
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