What is the most accurate way to find COL for a rifle ?

[Lefty Lawless]

That wasn't expected as a result of touching the lands with your load?

Yeah, but .125 longer seems like a lot

 

[red_zr24x4]

I'm gonna ask why? What kind of accuracy do you currently have? What is your load?rifle?twist?
Some loads like some jump, some loads like some jam.
I did the 10 shot load development test, and called it a day. And my load just flat hammers at 600 yards.

Same here
Played with powder, found the best group
Played with bullets, found the best group
Played with seating depth, found the best group
Savage 10FP in .223, cover a 5 shot group with a dime at 100 yards. Was hitting prairie dogs out 400 + yards

 

[Creedmoor]

My father called that, a Lovelace throat.

Yeah, but .125 longer seems like a lot

Very typical...

 

[bwframe]

I'm not near as experienced as some here.

I used the Hornady comparator factory stuff and ran my .243 at .015 off the lands. My first ladder yielded two different loads with a 1/2" group that I called good. (Best groups I ever shot, period. )

IIRC, I ran 300BLK .030 off the lands, so they'd still fit in the magazine?

 

[Hawkeye7br]

I use 2 doll rods. Costs about $1.50.
Step 1- Close bolt on rifle, insert doll rod into muzzle until it touches bolt face, draw a thin line on the doll rod where it exits muzzle.
Step 2- remove bolt and doll rod. Point rifle vertically down, drop your intended bullet into the empty chamber. Hold it in place with cleaning rod or another doll rod. Make the rifle horizontal, keeping pressure against the rear of the bullet. Insert the original doll rod into muzzle until it touches the bullet. Make another mark on the doll rod.
Step 3- measure distance between the 2 lines on doll rod using accurate calipers. This is the oal of finished cartridge with that bullet. Load a dummy round to that length, measure the ogive length with a bullet comparator from Sinclair/Brownells in that caliber. Test the dummy round in your chamber. This length will let you make reloads with any shape bullet, and consistently have bullets at the lands, or seat bullets deeper if you want to jump a little.

There's probably a YouTube video somewhere that demonstrates all this.

The bullet comparator is one of the most useful tools on my reloading bench. A true time saver.

 

[Hawkeye7br]

A late question.... are you wanting the col to build reloads, or to just make sure the loaded rounds will fit in the magazine?

 

[55fairlane]

Okay so I got my 300 win mag brass tapped and put a 200 grain SGK bullet in and it's too long to fit in the magazine

Very typical with a load that touches the rifling

 

[WebSnyper]

Bidenomics and the scamdemic forced all pricing to insanity levels.

Forced is a strong word. I don't think it took too much pursuasion to get a lot of these companies to raise their prices.