Weird Browning A-bolt 30-06 Reload COAL

[Alibiiv]

I have several rifles that have been built by the same smith on the same platform; Ruger 77, tang safety rifles. Whenever I build or purchase a rifle my son ends up with one too. What I have noticed is that some of the loads in his rifle do not like what my rifle likes. My son has a 35 Whelen that will blow primers out with the same load that is the most accurate load for my Whelen. I can say the same about several other rifles that are exactly the same. I would like to suggest that maybe purchasing a set of comparators and some dial verniers would help figure out your situation quickly. I bought a tap and a tap drill on Amazon and I make my own "special cases" that are used to make the measurements to determine where the bullet meets the lands.

 

[Eric H]

Short throat IMHO.

 

[Rosebud]

Most likely needs a shoulder bump, could be a Ojive issue as well.
Fired cases in one 30-06 that hadn't been sized properly will not chamber in another rifle, even if it's the same caliber. I neck size and shoulder bump my rifles knowing they will not chamber in anyone else's rifle.

 

[SecretSquirrel38]

Will these brass chamber without bullets? If so, then your bullet seating depth (CBTO too long) issue and need to allow clearance with the lands, not jammed into the lands.

Loads perfect without a bullet. I noted in my log to seat them to under 3.2.

 

[SecretSquirrel38]

Were you reloading 165 Core-Lokts?

No. Hornady interbond, sst and sierra hotcore

 

[FEENIX]

Loads perfect without a bullet. I noted in my log to seat them to under 3.2.

So, anything over 3.2" with your current bullet choice, you are jamming the bullet into the lands. In short, you are stuck with that unless you have a competent/reputable gunsmith work on it to have a longer throat.

 

[med358-boise]

No. Hornady interbond, sst and sierra hotcore

As I mentioned in Post #7 above, COAL length is a fairly useless reference as soon as you switch bullet types. The tip of the bullet never engages the lands. It's the body of the bullet at full diameter that engages the lands and determines how long the maximum COAL can actually be. Desired COAL will depend on doing some accuracy tests

Every bullet you mentioned above will have a different seating depth. You need to follow the steps outlined in Post #7 to determine the derived max COAL for each different bullet and your chamber.

 

[SecretSquirrel38]

Yesterday at the range prior to scope adjustment and today hunting at 132 yards. 165 Hornady Interbond, 48.7grs of IMR4064. She didn't like it or go more than 18 yards facedown.

 

[98s1lightning]

All Mikoru Brownings I have encountered, and read about = short throat

Many bullets that are "popular and supposed to work for cartridge" need to be set back into case

This limits the rifles to be very picky on bullet choice if you want to load to full potential (bullet not hanging down inside case, robbing useable powder space)

PM me if you want more info

 

[98s1lightning]

I was going through this and found out a Rem 700 in 30-06 has wayyyy more COAL potential than the A-Bolt, might as well consider it a bigger rifle!!!
More heavy bullet options, more powder space

 

[Dmagna]

You can't just pick a random over all length and expect it to work. Make a dummy round or buy a hornady oal tool and a modified case. Then you don't have to worry about blowing yourself up.

 

[Eric H]

Buy the OAL plus this and make your own: 5/16-36 Right hand Thread Tap and 7.3mm Drill bit

 

[Philward]

One of my hunting partners has a Browning a bolt 3 7rm, he had one factory load that would not chamber in that rifle. He was shooting federals without issue but this other load could not close the bolt. I got his fired cases and use them in my rem 700. Measure to datum line on fired case is same in both rifles. Wish I knew what that factory ammo was, even he doesn't remember. Wonder if this was a short freebore issue.