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 Post subject: Good / bad range day
PostPosted: Mon Nov 02, 2015 12:19 am 
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I was at the range again today, kind of living there lately, not that I'm complaining. But anyway, I was doing some work with my DIL's Tika, which by the way shot amazingly. While her rig was cooling, I was getting my range finder TBR dialed in to my glass, to correlate with the load I'm using.

So I decided to shoot a couple 3 round groups to confirm it's still sighted in to zero, which is 230 yds with this load. So I printed my first group and it was stellar, seriously nice group. Second one was s carbon copy. So now I'm in a groove and don't really want to put my Ruger down. So I decide to shoot another group, but this time the first bullet hit over 6" low, still center, but low. I immediately knew something was up, cause no way it was me, at least not today. So I put another one down range. and this one is almost 6" high. So I decided to use a piece of tape as an indexing point on the scope tube, so I could tell if it moved. So I took another shot, this time it was touching the hole of the last round fired, at this point I'm not even worrying about where it's grouping, but if it's grouping at all. So I picked a fresh target, that way I could more easily determine how it's grouping. I put 3 together touching each other, then the 4th round was like 6" high again. I glanced at the index mark, and bingo, the scope was moving, sliding back actually.

In part, it's these darn lead sleds, they're really hard on mounting hardware and the glass also. I've had problems more than once due to the inertia created by shooting off a sled. I usually put an extra 4 or 5 inch pounds on my scope's, simply because I shoot off sleds a lot. But this scope got mounted at the LGS, I was there, they offered, I accepted, and then forgot to have him add a few additional inch pounds.

But the upside is, I got to print some very satisfying groups before I shook things loose. That's another thing, I always bring my tools and any necessary gear, but of all days, not today.

GS


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PostPosted: Mon Nov 02, 2015 12:56 am 
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Glad ya got that figured out. Thanks for taking that lesson for us and passing along the info.


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 Post subject: Re: Good / bad range day
PostPosted: Mon Nov 02, 2015 12:32 pm 
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Also glad you got it figured and that it's a simple fix. And good that it's grouping so well! ;)

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 Post subject: Re: Good / bad range day
PostPosted: Mon Nov 02, 2015 7:22 pm 
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I stick with the lighter rifle rests that move with the recoil. I might have to reset the whole darn thing every shot but I've read where other people have had the same problems with the lead sled and the recoil playing havoc with their scopes or the rifle in general.

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 Post subject: Re: Good / bad range day
PostPosted: Wed Nov 04, 2015 5:43 am 
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mogunner wrote:
I stick with the lighter rifle rests that move with the recoil. I might have to reset the whole darn thing every shot but I've read where other people have had the same problems with the lead sled and the recoil playing havoc with their scopes or the rifle in general.


Ya, you are so right, been lots of folks that have experienced problems associate. I either shoot it empty, or I'll only put 6 or 7 pounds in it. Vortex has been pretty busy with me over the last couple years, due in large part to the effects of sleds. But not all of those were user induced sled damage.

Last year a really good friend of mine shook a Zeiss loose while shooting his 300 WM off a sled.

GS


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 Post subject: Re: Good / bad range day
PostPosted: Wed Nov 04, 2015 7:31 am 
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I used to have a Ruger in 300 Win Mag.
I used to shoot the heck out of that thing!!
Prairie dog hunting even... How smart is that!

My scope moved on it a couple of times - but forward if I remember right...

That 300 mag is when I learned there are 7,000 grains in a pound.
The 1st time I reloaded a 100 rounds for it...

75 grains x 100 rounds = about 93 rounds and your pound of powder is gone!!

But that's for sure the 1st thing to check when a rifle starts shooting way off target -The rings and mounts.

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 Post subject: Re: Good / bad range day
PostPosted: Sun Nov 08, 2015 4:00 am 
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No kidding Jason, powder doesn't stretch very darn far in those large magnum cartridges such as 300 WM. I load for a couple of those big dogs, and the powders and charges I run consume large quantities of powder. I think the last data I worked up to for an elk hunt last year was burning 82 grs., like wow, I had to have at least 2 lbs. just to warm the barrel up, ya know. that's like only 85 rounds or so, bummer.

But ya, back to the trusty Ruger, I've had my share of problems using these lead sleds over the years. one thing I learned early on is, don't shoot high powdered rifles with aluminum rings or bases, they just can't handle the extreme inertia. I broke a set of aluminum rings years ago while trying to get them tight enough to stop the scope from sliding, obviously that didn't go well. Wasn't my rig, and definitely not my mounting hardware, I've never use anything aluminum on a moderately recoiling rifle / cartridge.

I've also rattled a scope or two loose using sleds, erector lens on one of them got dislodged I think. But unless I find it physically necessary, as in the recoil is beyond what my extremely old and damaged shoulder can tolerate, I usually shoot them empty, or with very little weight in them. And aside from how hard they are on the glass, they can also cause some weird stuff to happen on paper. I strap my rifles down keeping the retention directly over the front action screw.

GS


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