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Problem with .270 grouping at 100 yrds

 
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  #1  
Old 11-12-2011, 03:39 PM
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Join Date: Nov 2011
Posts: 4
Problem with .270 grouping at 100 yrds

Greeting!

I'm hoping someone can give me a "light" to what is going on with my Remington .270, topped with a Leupold 3x9 VARX III. Or, more than likely, what is going with "me" and my use of my Remington .270.... (I.e. It's a poor crafstman that blames his tools. LOL.) Anyway...

I've sighted in a few rifles in my time, but's it been a few years since having done so. So, I'm thinking I might be missing something, or, just been lucky in the past.

First, you should know, I bedded and floated the barrel of the rifle a couple weeks ago using Devcon 10110 as a bedding compound. I'll say that the job turned out great and I floated the barrel starting at 1.75" ahead of the receiver lug, down the channel, with the thickness of 2 strips of masking tape. It passed the dollar bill test with no problem.

I headed out to the local range and I started at the 25 yard mark. My first shot was 2" low and 2" right. I made my adjustment and got the 3 shot grouping I wanted, which was 2.5" above bull. I was grinning from ear-to-ear because I was shooting a rather tight clover leaf. Than, I moved to 100 yards for the fine tuning -- if any (I thought).

This is where it got interesting. I squeezed off my first shot and I wasn't even on paper! I thought, "that had to be me!" Squeezed off another; same thing. The problem was that I only had a couple 8x12 targets out there and all the real estate surrounding them was peppered with bullit holes from previous shooters. So, I really couldnt' see where I was impacting off target.

Than, I ran out of time -- the range closed. The targets I was using where those made by Bullseys that are black and have the yellow backing so it's easy to pickup your shot placements. I walked out to retrieve my target stand and, sure enough, complete misses. But, something I did notice was small yellow "specs" (about 12-15 of 'em) all the target (?). Than it occured to me, could I be hitting the dirt in front of the target by several feet which is causing small bits to hit my target and cause these "specs"?

I started thining about my "session" when I was working at 25 yards; thinking maybe I was sighting in not accounting for parallex. But, I fired several shots and couldn't imagine not seeing a shadow - the site picture looked real clean around the circumference of the scope. (I hope. LOL.) Also, shots were not quick, and the barrel did not heat up.

Sorry for the long-winded text. But, I find the more information you put into a forum the better answers you will get.

Any ideas would be appreciated!

Thanks!
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  #2  
Old 11-12-2011, 04:57 PM
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Join Date: Nov 2011
Posts: 5
Re: Problem with .270 grouping at 100 yrds

Your target is too small. Assuming a perfectly flat tracectory (not possible, but for illustration) 2.5 high at 25 yards would be 5 high at 50 yards and 10 high at 100. I expect you are shooting over your target at 100 yards. Try a bigger target, or site in 1/2" high at 25 yards. Or both
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  #3  
Old 11-12-2011, 05:11 PM
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Join Date: Jan 2005
Location: OK
Posts: 2,145
Re: Problem with .270 grouping at 100 yrds

+1

rockfish, your first post, and it was the best first post I seen in ages.
Welcome to LRH both of you guys.
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  #4  
Old 11-12-2011, 05:40 PM
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Join Date: Feb 2011
Location: Cincinnati, Ohio
Posts: 1,875
Re: Problem with .270 grouping at 100 yrds

To go along with what Rockfish posted...with my .260 1/2" high at FIFTY yards will put me 1.4 inches ( just a tad less than 1 1/2) at 100 yards.

( With my 243 its .3 @ 50 and 1.2@ 100) With my 22-250 its identical to my .243...
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  #5  
Old 11-14-2011, 10:45 AM
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Join Date: Nov 2011
Posts: 4
Re: Problem with .270 grouping at 100 yrds

Thanks rockfish1! This was one of those "ah-ha" moments.
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  #6  
Old 11-14-2011, 02:49 PM
Silver Member
 
Join Date: Feb 2011
Location: alabama
Posts: 125
Re: Problem with .270 grouping at 100 yrds

I had the same problem with the remington .270 that I had. It wasn't until I learned about how twist rates work, that I finally got it to hit paper at 100 yards. The model I owned had a fast twist rate and when I started pushing heavier bullets through it, it stabilized better and got a little more accurate. By that time, I was so pissed at the rifle that I ended up selling it and buying myself a new savage .308. Good luck with yours
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  #7  
Old 11-20-2011, 04:50 PM
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Join Date: Nov 2011
Posts: 4
Re: Problem with .270 grouping at 100 yrds

Thanks to everyone that replied to my question. With all your insight, I was able to make the adjustments and she's now grouping nicely at 100.

Have a good holiday!
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