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Help with 300 ultra groups....

 
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  #1  
Old 10-06-2012, 10:53 PM
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Join Date: Mar 2010
Location: Idaho Falls
Posts: 292
Help with 300 ultra groups....

First let me say hello all and thank you. I have been lurking here for quite some time and the wealth of imformation has helped me a ton. I am not new to hunting znd shooting but have just got into this long range thing over the last few years.

What im trying to do is build a good huntin load that will hold sub moa groups out to 1000.

My rifle was just a model 700 sps plain janer..... I bought the sendero barrell off here,bought a B and C stock and skim beded the action. Factory trigger has been done as well.

All my brass has been match prepped..... I have heard this dont make any difference on a factory chamber but I had fun learning and doing it haha.

Load is rem brass match prepped cci 250 3.03 to ogive. Berger 210

So my question for you guys is how would you interpret this target. It was shot at 100 yards. The 91.5 grain retumbo load looks good but the vertical has me concerned..... Also the 93 grain load looks good minus the flyer but its possible i pulled it.

The two at 88.5 were foulers. The bottom right was the new 215 berger hybrid. It was 91.5 retumbo and had sticky bolts so way to hot. Im just gonna focus on the 210 for now and leave the 215 for next time.
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Last edited by IdahoRedneck; 10-06-2012 at 11:05 PM. Reason: Forgot to add bullet to load combo
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  #2  
Old 10-06-2012, 11:01 PM
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Join Date: Mar 2010
Location: Idaho Falls
Posts: 292
Re: Help with 300 ultra groups....

I forgot to give ya some important info.
91.5 averaged 3055 es of 29.
92 averaged 3072 es 33
92.5 averaged 3090 es 9
93 averaged 3095 es 33

Thanks in advance.........any tips or advive on what you guys would do with this is much appreciated.
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  #3  
Old 10-07-2012, 12:16 AM
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Join Date: Dec 2008
Location: Meadville, Pa
Posts: 71
Re: Help with 300 ultra groups....

Shoot the 91.5, maybe try fed 215 primers to see if it may help lower spreads. Could also play a bit with seating depth in .005" increments to see if you can fine tune any more, but it looks good. If this doesn't help just shoot the load as it is and see how it performs further out...good luck
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Old 10-07-2012, 06:47 AM
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Join Date: Nov 2010
Location: Rigby, Idaho
Posts: 208
Re: Help with 300 ultra groups....

I would increase the distance to min. 300 yards and re shoot. Also are you shooting all 3 rounds of the same load at a time then moving to the next charge? If so I would only shoot the first round of each charge, then the second round of each charge, then the last round. Marking each shot and allowing barrel to cook between shots. Takes a little more time, but well worth the info gained.
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  #5  
Old 10-07-2012, 09:38 AM
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Join Date: Mar 2010
Location: Idaho Falls
Posts: 292
Re: Help with 300 ultra groups....

Yes, I fired each charge weight as a group with the exception of the 4rth shot on the 91.5 grain load. That particular peice of brass was sticky in my shell holder on the press. It was the lowest shot in the group.
So move to 300 and retest all 4 charges?...... I have some 215 m primers I can test aswell. The reson for using the cci was I had much better spreads in my old load using ccis. But that was with us869 and this new barrel doesnt seem to like that stuff at all.
Its been a hell of a journey just getting this far but I can almost see light at the end of the tunnel I hope haha...
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Old 10-07-2012, 11:42 AM
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Join Date: Nov 2010
Location: Rigby, Idaho
Posts: 208
Re: Help with 300 ultra groups....

I am just up the road from you in Rigby, if you want we can get together and maybe I can be some help. Finished my 300 RUM last year and have validated it out to 1532 yards.
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  #7  
Old 10-07-2012, 01:29 PM
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Join Date: Apr 2012
Location: The cold part of Montana
Posts: 1,390
Re: Help with 300 ultra groups....

All 4 shoot well enough I'd do em all just like Mikieddem said, round robin style letting the barrel cool between shots. I'm betting in the end you'll go with the lowest ES
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Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
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