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good start with new toy

Posted: Sat Mar 15, 2014 10:09 am
by zx10mike
well i'm up a running with the new tikka.loaded up 12 bullets 4 weights 3 shot groups
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24.8 shows promise though fps was slow at 3300 so was thinking of moving on from 25 carefully to see if i could find a second sweet spot.not bad for the first batch in winds gusting from 15-20 mph and 0 to half value

Re: good start with new toy

Posted: Sat Mar 15, 2014 1:03 pm
by BooBear
What was the power and bullet for this load?

Re: good start with new toy

Posted: Sat Mar 15, 2014 1:32 pm
by zx10mike
sorry can't believe i never added that.siera 39 blitz and rl10x

Re: good start with new toy

Posted: Mon Mar 24, 2014 10:57 am
by zx10mike
well got out again today to do a bit more testing.being a tight git i thought i would try using h322 with the vatmint grenades as it had sat on the shelf and needs using.i stuck with 10x for the 39 sbk.
got the new tikka out
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set out a target at 100 yds
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and here were the results
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first the sbk 39s what can i say from 24.8 grn of 10x through to 25.4 every thing was under half inch,nothing special but i was shooting in 15-20 mph head wind and have not touched seating depth as yet so to me the sbk just want to work and once tuned and on a still day will yield some good tight groups.

then the varmint grenades.between them and the h322 i was laughing my butt off as they danced around the target grouping never sub inch and went where the heck they liked.

onwards with the sbk it is then i do like it when a load has a big accuracy node if i go with 25.2 i have room either side if the powder measure is .2 of a grain out.

Re: good start with new toy

Posted: Mon Mar 24, 2014 2:16 pm
by toasty
zx10mike wrote:
onwards with the sbk it is then i do like it when a load has a big accuracy node if i go with 25.2 i have room either side if the powder measure is .2 of a grain out.
Agreed, I analyzed your groupings before reading your post, I had 25.2 as well. I ended up seating the 39 sbks to 2.260". Groups were cut by about 1/3" from 2.25 to 2.26. When you land on your seating depth, I'd be interested to know.

I shot the 39 on pdogs this weekend in 5-15MPH winds at ranges from 200-400 yards. Was dialing a tad over a full minute on the 400 yards shots and those bullets did outstanding in the wind. I use to put the 204 away when winds got near 10mph for anything much beyond 250-300 yards, but it just kept on going and hitting dogs. Shot every last 39 I had loaded up.

Re: good start with new toy

Posted: Mon Mar 24, 2014 2:27 pm
by zx10mike
toasty in that wind if i was honest that was about as good as i can shoot.i have a silencer due this week wich might tighten things up a tad too.will try seating as they are again with different seating depths next outing. and post findings bud.did you alter your seating 10 tho at a time or less?

Re: good start with new toy

Posted: Tue Mar 25, 2014 7:37 am
by toasty
zx10mike wrote:did you alter your seating 10 tho at a time or less?
I did .010" from 2.200 to 2.28. There was another decent node at 2.2, but the 2.26 was the best. I have it on my list to go back and check 2.255 and 2.265. I have consistently shot around .5" groups at 100 yards with this gun, but was shocked to see that group shrink in half on a round robin test including the cold bore shot. I retested the load and got another .3" group on a 25 shot fouled barrel. Took me almost 3 years, 4 bullets, 3 powders, 2 primers and about 200 rounds to finally get what my gun likes. Guess I should have bought a cooper.

Re: good start with new toy

Posted: Tue Mar 25, 2014 8:01 am
by zx10mike
round robin test?

Re: good start with new toy

Posted: Tue Mar 25, 2014 10:10 am
by toasty
zx10mike wrote:round robin test?
Just means how I shoot my groups while doing load development. For different charges, I will shoot 1 shot of one charge, then move to the next charge and shoot a shot, then the next and so on, then come back for the 2nd shot of the first load charge and so on. I do this with seating depth as well. I feel like it removes some variables like shooting fatigue, barrel heat, etc..., however I think it adds some variables specifically related shooting form. I found, if you can shoot a group round robin, it will look as good or a little better for consecutive shots.

Re: good start with new toy

Posted: Tue Mar 25, 2014 1:11 pm
by zx10mike
ahh get it yep that is a good way to do it.