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300 RUM and Retumbo

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  #22  
Unread 03-25-2010, 04:31 AM
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Re: 300 RUM and Retumbo

Quote:
Originally Posted by trueblue View Post
Tang,
Take this for what it is worth:
300RUM working pressure of 64,977psi
COAL w/ 200gr SMK @ 3.620
27" barrel
Start pressure of 3626( +0.020 off lands)
95.9gr Retumbo= 3050fps @64,373psi 101.5% case capacity
97.35gr N570=3124fps@ 64,954psi 98.3% capacity
I will be happy if it makes 3050 and makes clover leaf groups.
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  #23  
Unread 03-25-2010, 08:42 AM
KDB KDB is offline
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Join Date: Jun 2009
Location: Arkansas Delta
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Re: 300 RUM and Retumbo

I can tell you that with 98.5 grains of Retumbo and 190 VLD out of my 28" tube, I was getting 3420-3450 out of mine...at least that's what my chronograph indicated. I have not been able to get awesome ES and SD's with Retumbo, but it has proved to be accurate at 1000K during ladder testing (little vertical stringing).

I would think that with the 26" tube that you should be able to get in the 3100 range with 208 or 210 pills with out issue. A lot depends on the shooter and the capability of the rifle and field conditions. 100 yds is not a true representation of what accuracy will be, especially with the longer bullets. I believe that they sometimes don't straighten out until further down range (yawing early in flight)

Also, look at the sticky thread on shooting VLDs for accuracy at the top of the reloading page.

Good luck and have your dentist on speed dial (for when your filling rattle loose under the recoil).
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  #24  
Unread 03-26-2010, 01:32 PM
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Re: 300 RUM and Retumbo

I have a box of 210 Bergers, but since I hunt in the woods, and closer ranges sometimes, I dont know if they are a good choice.
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  #25  
Unread 03-26-2010, 01:43 PM
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Re: 300 RUM and Retumbo

Quote:
Originally Posted by Tang View Post
I have a box of 210 Bergers, but since I hunt in the woods, and closer ranges sometimes, I dont know if they are a good choice.
I hunt in the woods as well and sometimes I'm lucky to be able to see more than 40 yards I shoot the 300 RUM /210 Berger and I haven't had any problems yet .
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  #26  
Unread 03-26-2010, 02:40 PM
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Re: 300 RUM and Retumbo

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Originally Posted by bigbuck View Post
I hunt in the woods as well and sometimes I'm lucky to be able to see more than 40 yards I shoot the 300 RUM /210 Berger and I haven't had any problems yet .

For guys that have Remingtons. I used two different methods to find the lands with the 210gr Bergers, and I come up with an average of 3.858". Does that sound about right ?
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  #27  
Unread 03-26-2010, 04:21 PM
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Re: 300 RUM and Retumbo

Quote:
Originally Posted by Tang View Post
For guys that have Remingtons. I used two different methods to find the lands with the 210gr Bergers, and I come up with an average of 3.858". Does that sound about right ?
my remington is still factory it want allow me to get to 3.858 OAL I've got a wyatt extended box mag just sitting there waiting to be installed seems like I remeber one of the members here say that 3.800 was max I could be wrong though . my rifle likes the bullet seated to were it will just clear the mag box and I shoot the 210 Berger 3 shots at 200 yrds one little clover leaf . Retumbo Powder Federal 215 match primer remington weight sorted brass full lenght sized . Don't laugh but I only load it to 87 grains . I like what the paper says when my group is finished . Have you tried the low side ? it's good to run mach 10 but until I could hit at mach 10 then I would work up from the low side . Just my opinion

Good luck

Bigbuck
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  #28  
Unread 03-26-2010, 04:24 PM
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Re: 300 RUM and Retumbo

Quote:
Originally Posted by Tang View Post
For guys that have Remingtons. I used two different methods to find the lands with the 210gr Bergers, and I come up with an average of 3.858". Does that sound about right ?
Man It bugs me when I can't remeber . If you go to midway and look up the wyatt extended box it will say what the max is . It may have been 3.900 oh well I'll go their myself if no one else chimes in

Okay I went and checked it out midway says that the wyatt extended mag box is this 3.810 inside and 3.890 outside I assume your Remington has a wyatt if your getting 3.858 . Eaglet would be someone that you could PM he shoots the RUM as well and he's very friendly to boot.

BigBuck
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Last edited by bigbuck; 03-26-2010 at 04:31 PM.
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