Blowing out Brass recommendation

[rangertim]

I’m necking up 6 BR Brass to 7 mm then blowing out to 30 BR in a old shot out 30 BR Barrel before turning ! Why the trouble ? to get necks as straight as possible and a little longer necks ! So a 120 grain Bullet will be use what powder would you use H-4198 in my mind seems a little hot for the 7mm BR ! Thanks for your input

 

[Bill Norris]

H-4198 seems to be the slowest of the Hodgdon powders I find listed for the 120 class bullets.

 

[rangertim]

I guess with a 7mm bullet in a 30 cal barrel it should be about the same has COW and a wax plug Just saying ! I guess after thinking about it would a small charge of pistol powder with a bullet seated be much different than a plug and save the bullets I know the necks will be Straight but I might not get any Lenght on my necks will all the trouble! I guess your wondering why I need longer necks ? Because a certain Reamer grinder don’t have anyone that can use measuring equipment and I gave them 2 shoots at it it’s now 1560 OAL down from 1570 LOL !

 

[Bill Norris]

Yea, it's hard to say. I just neck on up to .30 cal and shoot em. The accuracy is fairly close to the once fired cases. I shot several one ragged hole groups while blowing out my brass with cheap (back then) bullets.

 

[tmwinds]

Your reamer maker just screwed up. They cut the length for a 6BR with the 1.560 length. The .30BR length should have been 1.510. I don’t know of anything you can do to get anywhere near that length. About the best you will get is 1.505-1.507.
It will probably shoot just fine but you will need to keep the carbon out of the chamber neck.

 

[std7mag]

Wait.....
Your necking 6BR cases to 7BR, then firing 7BR in a 30BR barrel?

Am i the only one scratching my head on the wisdom of shooting a 7mm bullet down a 30 caliber barrel?

 

[JFrank]

I guess with a 7mm bullet in a 30 cal barrel it should be about the same has COW and a wax plug Just saying ! I guess after thinking about it would a small charge of pistol powder with a bullet seated be much different than a plug and save the bullets I know the necks will be Straight but I might not get any Lenght on my necks will all the trouble! I guess your wondering why I need longer necks ? Because a certain Reamer grinder don’t have anyone that can use measuring equipment and I gave them 2 shoots at it it’s now 1560 OAL down from 1570 LOL !

I would not use a wax plug, rather a tissue or 100% cotton ball

 

[M-61]

in a old shot out 30 BR Barrel

How many rounds did it take to shoot-out a 30BR barrel?

 

[M-61]

I shot several one ragged hole groups while blowing out my brass with cheap (back then) bullets.

I did also. Pulled 30 carbine bullets. At 100 yrds with that bullet I could get 3 touching out of 5.

 

[jimmymac]

If you are going to do your fire forming with a bullet other than 30 caliber, why bother sizing up to 7mm to begin with? Why not shoot a 6mm bullet and see how it goes. Just fire form one or two then measure your brass. Or has been previously mentioned, don't fire a bullet at all. I believe @butchlambert uses wax plugs when he is making 6 PPC brass from 220 Russian brass.

 

[457ciSBC]

I guess with a 7mm bullet in a 30 cal barrel it should be about the same has COW and a wax plug Just saying ! I guess after thinking about it would a small charge of pistol powder with a bullet seated be much different than a plug and save the bullets I know the necks will be Straight but I might not get any Lenght on my necks will all the trouble! I guess your wondering why I need longer necks ? Because a certain Reamer grinder don’t have anyone that can use measuring equipment and I gave them 2 shoots at it it’s now 1560 OAL down from 1570 LOL !

Guess you will need a cartridge neck stretcher!

 

[jackieschmidt]

My 30BR reamer is 1.1560 on purpose.

I make my cases this way. I took a 6BR barrel and reamed ot the neck to .330. When I fire a full load 6BR case in this chamber, out comes what looks like a Factory 30BR case ready to neck turn, if there was such an animal. The lengths are around, 1.545.

I do my cases this way because years back, necking the things up was a pain, so I came up with my method. It retains much of the original 6BR length, so I had Pacific Tool grind a reamer to untilize this.

The reamer is listed in the Pacific Tool library as 30BR Schmidt.

 

[Ggmac]

Use 308 or 30-06 brass for really long necks . Looks weird .

 

[rangertim]

I have done Jackie’s method several times, But I don’t have tha FF barrel anymore, it was a 6 BR with a 330 neck reamed long it would get them to 1540 easy ! I just had some junk 7 mm bullets so I was going from 6 to 7mm in one pass then blowing them on out to 30 to straighten the neck and blowing the shoulder out , don’t know if it will get them any longer than my 5 step process from 6 to 30 that gets them to 1520 ! I have a JGS 1530 OAL Reamer on order ! I ask the other guy to Fix mine but I guess they only grind 10 thou off at a time it went from 1570 to 1560 but we couldn’t go to 1530 LOL

 

[rangertim]

How many rounds did it take to shoot-out a 30BR barrel?

I don’t know it was supposed to be almost New according to the Guy that Lied to me that I purchased it from on here a few years ago ! I guess I would have to ask Him ! But he didn’t seem to be interested on refunding my money so he would probably just lie about the round count LOL ! Most expensive FF barrel I will ever purchase !!!!

 

[M-61]

I don’t know it was supposed to be almost New according to the Guy that Lied to me that I purchased it from on here a few years ago ! I guess I would have to ask Him ! But he didn’t seem to be interested on refunding my money so he would probably just lie about the round count LOL ! Most expensive FF barrel I will ever purchase !!!!

I actually asked because (IMO) I didn't think it could really be done. I know that's not realistic but the number of rounds needed to shoot-out a 30BR barrel...well I've have never run into anyone saying the barrel was done. I guess there is folks on the site that may have, but I'd really like to know the number.

 

[rangertim]

You are probably up in the 6000 Rounds But I’m going out on a limb and saying accuracy probably drops off on a 30 BR at 5000 and that depends on Barrel maker and if it’s a cut or a button! I know Randy Robbinet (aka) Mr Bib bullets I think had one at 6000 that still shot real good !