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great load development article

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/22/2009 at 22:17
ccoker View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/22/2009 at 22:35
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it's interesting, I am trying to work up some good loads for my 270 using H4350 and the Barnes 110g TTSX

went out and shot this evening at an indoor 100 yard range

got several sub MOA groups, one was center to center .66, two touching
but, had some vertical stringing

barnes are reported to run best hot and my two groups that had rounds touching were near max load according to Barnes and over max load according to Hodgdon but no pressure signs whatsever

one group was 2 grains lighter, my starting load, middle of the Hodgdon data was right at the same c-c but were a circle group

at first, the rounds touching groups where where I thought I needed to play around at but I am having second thoughts

I wasn't trying to shoot ultra tight groups, just seeing what powder charges gave me the best group then start fine tuning around that accuracy node

when I really get serious about groups I shoot one round and that hole becomes my aiming point, groups definitely tighten up then

fun stuff nonetheless
think I definitely have potential with this bullet and powder in my 270

it's wicked deadly at 2600 FPS out of my 6.8 and 32-3400 out of a 270 extends that range out to 500 yards, not that I ever would but it's nice to know I can easily take 300 yard shots with a light wind which is about max for most of the places I hunt at
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/23/2009 at 08:01
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All my experience with Barnes bullets agress with the "Barnes Like It Hot" statement.  My best groups are always at or right at max charge.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/23/2009 at 09:17
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thanks
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/23/2009 at 11:38
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I read that article too and it is really helpful in thinking about load testing. Also check out Jason Baney's article here: http://www.6mmbr.com/laddertest.html
I'm not at all interested in going out to 1000 but can still apply his ladder testing methodology at shorter ranges. One thing that Treo mentioned was load testing farther out (and obviously Baney is entirely concerned with that) but maybe having to settle on 200 instead of 300 because of wind.

From Baney's article and some other things I've read lately (mostly in Bryan Litz' book) I think it's more important to be concerned with the vertical spread, which is generally not affected by wind much...at least at a flat range. I've taken to shooting more out at 300 while load testing. Last time out at the range I got some horizontal spread at 300 (as much as 6") but all my verticals were within 1 1/2" on the load I brought. The only difference I was testing this time was seating .308 rounds at 2.79 OAL vs. 2.84 (the max I can fit in my magazine). Both grouped the same vertically and had the similar velocities but the 2.79s shot the wider groups. Could have been the light wind.

If you think about it, an animal's body is wider (longer) than it is high so even though I don't want to waste meat with a poorly placed shot, I'm not as concerned with some horizontal spread as I would be with a vertical spread of 6".

Forgot to mention: If you use Baney's color-coding method, you can now buy sharpies in lots more colors.


Edited by jonoMT - September/23/2009 at 11:39
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