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300 RUM 220 smk and retumbo?

 
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  #1  
Old 12-06-2010, 12:47 AM
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300 RUM 220 smk and retumbo?

I need to know where to start. I searched and it looks like anything from 88-95g for the 210's but there isnt much info on the 220 smk for the 300 RUM. Thanks for any help. And sarcasm is also appreciated.
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Old 12-07-2010, 10:11 PM
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Re: 300 RUM 220 smk and retumbo?

Happy, I'm looking at Sierra's fifth edition and for the 220 SMK with Retumbo, they state 78.0 as minimum, to 89.5 max. Hope this helps.
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Old 12-07-2010, 11:47 PM
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Re: 300 RUM 220 smk and retumbo?

That seems about right, cause my max load for 210's is 94gr of Retumbo and my max load for the 240's is 86gr of Retumbo. So the 220 are probably around 90gr max load.
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Old 12-08-2010, 10:57 AM
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Re: 300 RUM 220 smk and retumbo?

Thanks guys. Thats about what I figured. I think I will start with a load of 83 and go from there. There just isnt much real world data on the 220. I figured I might as well give them a try.
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Old 12-12-2010, 10:33 PM
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Re: 300 RUM 220 smk and retumbo?

Well, I took out the old girl today with some test loads. I started at 87.5g just touching the lands. I went up in half grain increments up to 90.5g. The best node was at 88g- 88.5g both shot under .3" groups. I am pleased to say the least. I didnt bring the chrono as I was just wanting to see how these grouped. Next I will play with the seating depth and take the chrony out and see how consistent this loads gonna be.

To say I have finally found my load is a real relief. I have been beating my head against a wall with H1000, RL25, and 210 bergers. I guess my stick doesnt like any of those combos.
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Old 12-12-2010, 11:11 PM
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Re: 300 RUM 220 smk and retumbo?

That's good news. Keep us posted with your results and velocities. I've always wondered about that combo as well, glad to hear some good feedback on it.
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