Need help troubleshooting 300 RUM pressure issue.

[MontanaRifleman]

Tikka lover is getting a new shipment of Norma brass in on Friday. Here is the thread in case you Havnt looked. It is the last post on the thread.

http://www.longrangehunting.com/forums/f19/norma-300-ultra-mag-brass-stock-123899/index3.html

Thanks Korhil, but no more soft pockets for me. I'll take my chances with the BB

 

[royinidaho]

This is the first time I have ever done the super glue thing

LMAO, now ya know where I was a couple of years ago when a bunch of ya got all over me for the "super glue thing".

Bet the trend will continue as brass becomes harder to come by. .

 

[Toptuna]

Correction: I started a thread on Norma brass (who also makes the Nosler brass)

Yup, I would think Retumbo a bit fast for the 7 RUM and even 33 might be a bit fast until the 195's come out.

Anyway, I'm done with Rem brass in the 300 RUM. Bertram for me.

Excuse my ignorance but I can buy 338 edge bertram brass and size it down to 300 rum?

 

[royinidaho]

Excuse my ignorance but I can buy 338 edge bertram brass and size it down to 300 rum?

I wouldn't see why not. I'm planning on getting some and fire forming to 270 AM.

 

[MontanaRifleman]

Excuse my ignorance but I can buy 338 edge bertram brass and size it down to 300 rum?

Yup, that is exactly what I am going to do.

 

[MontanaRifleman]

LMAO, now ya know where I was a couple of years ago when a bunch of ya got all over me for the "super glue thing".

Bet the trend will continue as brass becomes harder to come by. .

I'm glad someone got some humor out of it

 

[supercrossbmx69]

Montanarifleman, how far off the lands are you with the 230s?

 

[Toptuna]

Yup, that is exactly what I am going to do.

sorry for all the off topic posts but can some one PM me and fill me in on how the heck to do that. Im new to all this. I did a ladder today and just blew one ragged hole throughout he target with my 300 rum today with 6 rounds before the bolt was a wee bit harder to lift and the back of the brass had the ring on it. doh……………..

 

[MontanaRifleman]

Montanarifleman, how far off the lands are you with the 230s?

Approximately 5-10 thou off the lands. The throat apparently grew about .060-.070" during the intensive lapping with IOSSO

Oh well, can't complain about the accuracy

 

[MontanaRifleman]

sorry for all the off topic posts but can some one PM me and fill me in on how the heck to do that. Im new to all this. I did a ladder today and just blew one ragged hole throughout he target with my 300 rum today with 6 rounds before the bolt was a wee bit harder to lift and the back of the brass had the ring on it. doh……………..

Just run it through a sizing die. The 338 Edge is actually a 338-300 RUM. The parent case is the 300 RUM necked up to 338

 

[Toptuna]

Just run it through a sizing die. The 338 Edge is actually a 338-300 RUM. The parent case is the 300 RUM necked up to 338

gracias my friend. I always take heed to your advice on here and once again.

 

[MontanaRifleman]

gracias my friend. I always take heed to your advice on here and once again.

Denada

 

[supercrossbmx69]

Approximately 5-10 thou off the lands. The throat apparently grew about .060-.070" during the intensive lapping with IOSSO

Oh well, can't complain about the accuracy

Okay I was just wondering because I see your ES numbers are good but not amazing. And I've seen quit frequently with rl 33 that the farther you seat the bullets, the lower the ES numbers get. So I was just going to pass that on to you just in case you haven't considered it yet. But looks like your way ahead of me!

Good shooting!gun)

 

[MontanaRifleman]

Okay I was just wondering because I see your ES numbers are good but not amazing. And I've seen quit frequently with rl 33 that the farther you seat the bullets, the lower the ES numbers get. So I was just going to pass that on to you just in case you haven't considered it yet. But looks like your way ahead of me!

Good shooting!gun)

Thanks... yeah, I was aware that guys were seeing better ES's close to the lands. Some of those ES's that i shot may have been before i realized the throat had grown. Some of those bullets were jumping 70 thou or more. Once I get some new brass I'm sure I'll see better ES's.