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7mm rum 7mm rm 180 vld velocities

 
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  #8  
Old 11-22-2009, 03:09 PM
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Re: 7mm rum 7mm rm 180 vld velocities

That's interesting. Is it stamped "7 remington magnum"?
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  #9  
Old 11-23-2009, 01:13 AM
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Re: 7mm rum 7mm rm 180 vld velocities

I'm running 66.8grns RL22 in 7mmRM with norma brass, 180 berger, .120 from lands. My crono is reading 3000fps and its printing submoa @1000yds. I went through a box of bullets before finding the sweet spot .120 from the lands. I could not run this much powder with the bullets seated closer to the lands without amping up the pressure.

This is the third time I have loaded this batch of brass. I have only neck sized the brass and they still chamber with just a slight bit of press and the primer pockets are still tight as a drum. Primers show a little crater and no extractor marks on the brass. I did fire lapp the bore with the tubbs before load development.

I feel this is close to max in this rifle and no reason to push it further. I shot a big Mo buck in the shoulder with this load last week @ 150yds. It was a big bang flop DRT.
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  #10  
Old 11-23-2009, 02:12 AM
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Re: 7mm rum 7mm rm 180 vld velocities

Thanks for the info. I was wondering if I was the only one obtaining these kind of velocities with this combo. My load is super accurate. I really want to know how far people are pushing the 7rum with this bullet. On your seating depth did you mean .012"? Just curious.
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  #11  
Old 11-23-2009, 08:08 AM
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Re: 7mm rum 7mm rm 180 vld velocities

My 7rum is pushing 180 bergers around 3250 fps with retumbo. Brux barrel 27"
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  #12  
Old 11-23-2009, 03:09 PM
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Re: 7mm rum 7mm rm 180 vld velocities

Is this a "hot" load cowboy? Are you seated at or in the lands? Thanks. Oh and what powder? I have retumbo but was thinking us869
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  #13  
Old 11-23-2009, 06:38 PM
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Re: 7mm rum 7mm rm 180 vld velocities

Off the lands, don't remember how much. Not a hot load it is with-in book max, may-be 1-2 grains under. 869 gave higher velocities than that within book max.
My cronograph reads it at 3225, but balistic calcs compared to actual drops says it's at 3260.
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  #14  
Old 11-23-2009, 06:51 PM
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Re: 7mm rum 7mm rm 180 vld velocities

That's funny you mention your ballistic program #'s have to be fudged higher. This is the same experience i have had with my 7rm with bergers. I thought it was nuts when they lowered there b.c. because I have found the opposite. I'm a little bummed with the 7rum I just got because it has the most freebore I have ever seen. My sendero 2 in 7rm is perfect. The bullet enters the case plenty and I am free to seat to the lands if I want. Not so with this gun. I can't even get to the lands. Way too much freebore. My experience with the bergers in many calibers is that they like the lands and I guess I'll see if they work way off the lands.
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