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7mm RUM velocity with 180's

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Unread 05-01-2008, 09:05 PM
Silver Member
Join Date: Dec 2007
Posts: 130
How was the accuracy with 869? What was the barrel length? Thanks.
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Unread 05-01-2008, 09:18 PM
Gold Member
Join Date: Dec 2001
Location: Southwest Desert
Posts: 847
With a minimal amount of testing I was getting 3185 fps with the Berger 180's using 89.5grs of Retumbo out of a 27" Rock 1-9" twist barrel.
The load was close to max, might have been able to go another grain but didn't see the need.
Accuracy was acceptable but not outstanding, .75 moa for 3 shots at 1K.
I definitely will be trying US 869 in the future.

Wayne aka WAMBO
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Unread 05-01-2008, 09:31 PM
Platinum Member
Join Date: Feb 2004
Location: Pennsyltucky
Posts: 2,630
mine went 3250 comfortably, could go over 3300 with extractor marks. 99gr of 872 powder, lilja 7T,M 30" barrel. didn't try other powders. i would not use a 3 groove barrel with this amount of overbore and Berger jackets. i have a friend that would dust 168 Bergers with a 9T and 6 grooves. i would recommend a 5R barrel as the minimum number of lands for this combo.
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Unread 05-02-2008, 06:42 AM
Platinum Member
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
My barrel was 30".

Accuracy with US869 wasn't great (MOA). I burned up 2 lbs and still didn't find anything I was happy with. Retumbo was my goto powder.
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Unread 05-02-2008, 07:12 AM
Silver Member
Join Date: Aug 2007
Location: bismarck ND
Posts: 406
i know that im not shooting a rum but i am getting 3230 out of my 7mm wsm burning 67grs. im sure that you guys should easily get 3300 out of a RUM
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Unread 05-02-2008, 07:41 AM
Join Date: Jun 2007
Location: North Idaho
Posts: 1,877
I have gotton between 3250-3300 with the Berger 180 in the ones I have built out of a 30" hart barrel.
Shawn Carlock
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Unread 05-02-2008, 08:53 AM
Silver Member
Join Date: Feb 2007
Location: Florida
Posts: 171
I ordered the 3 groove barrel with the thoughts that the wider lands might slow the throat wear down alittle. The last 4 barrels I have bought have all been 3 groove and they have all been outstanding. They have been in slower rounds like the 6Br, 308, and 338-300. Would you quys go with something different then a 9T 3groove for the 168-180 bullets in a rum? I would not have thought that the 3 groove would be too hard on the bullets. Doesn't Kirby build alot of his 7mm allen mags with a lilja 3 goove? I think 9T will be fine @ the speed I will be pushing the 180's but I'm not really sure. Any info will be great. Thanks
Earl Fouraker
NRA Life Member
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