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What did you do today in the reloading room?

I have a spare dehydrator that I use if I need the brass right away, but usually I use a big towel, to drop them on after I spin them in the media separator, then pickup the four corners and roll them back and forth for a bit. They usually dry pretty fast, but I always do a bunch at a time way ahead of needing them so only needed to use the dehydrator a couple times. The brass dries pretty fast, and since I put a small amount of car wax in the water, they don't have water spots.
 
Well, I somehow got a bit absentminded and forgot that I was bumping the shoulder on 250 pieces of brass that I sized, tumbled and primed. It's .223 brass and all are now pretty consistent at 1.768 in length. And I can't find my WFT to trim them so I have another one on the way and will be trimming primed brass when it gets here.
 
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MUP et al:

I'm shooting 160g Accubonds in a 7mmRM Tikka Superlite at 200 yards. I couldn't get RL-22 to be consistent so I switched to IMR7828ssc. Headspace is 2.122 in Rem Peters brass; Base to Ogive is 2.72. My Tikka has a long, long throat so I am keeping seating depth the same. The Base to Ogive is very close to the published 3.29 COAL. 67.5g of 7828 was twice under 1MOA last weekend - a .8 and a .6 group. This Saturday I went out to shoot a confirmation group and my barrel was warm when shooting the first pic (.42MOA). I came back Sunday after moving my scope 3 clicks right and 1 click down (Burris FF2 3-9x40). I shot five times. The second pic is the first three shots (.64MOA), the third groups shows shots 4 and 5 giving me a 1.5MOA. But why at 200 yards did my POI move so much? And why did it move up when I clicked it down? I need to get my POI w/i an inch of my POA, but I can't seem to do so? I don't really think my scope is bad, but that's all I can come up with... Any ideas are welcome. -B
 
TNBillyEarl said:
View attachment 129044View attachment 129045View attachment 129046

MUP et al:

I'm shooting 160g Accubonds in a 7mmRM Tikka Superlite at 200 yards. I couldn't get RL-22 to be consistent so I switched to IMR7828ssc. Headspace is 2.122 in Rem Peters brass; Base to Ogive is 2.72. My Tikka has a long, long throat so I am keeping seating depth the same. The Base to Ogive is very close to the published 3.29 COAL. 67.5g of 7828 was twice under 1MOA last weekend - a .8 and a .6 group. This Saturday I went out to shoot a confirmation group and my barrel was warm when shooting the first pic (.42MOA). I came back Sunday after moving my scope 3 clicks right and 1 click down (Burris FF2 3-9x40). I shot five times. The second pic is the first three shots (.64MOA), the third groups shows shots 4 and 5 giving me a 1.5MOA. But why at 200 yards did my POI move so much? And why did it move up when I clicked it down? I need to get my POI w/i an inch of my POA, but I can't seem to do so? I don't really think my scope is bad, but that's all I can come up with... Any ideas are welcome. -B
Click to expand...
I was typing away and it ran away from me, so decided to just find an article that best explains the method I plan on using. This guy, and a few others have expanded the 10 shot development method a bit, but I think the concept is the same. I normally loaded 3 round ladders and just looked for my best group at the range I planned on hunting, normally 100yds. Now that I got more equipment, like a chrony, I think this method will work out just fine. The 6.5 CM will be my test dummy, as I have three different types of bullets to try this out on, if it works out I may go back and workup a load for the 308 and 5.56 too.

LOAD DEVELOPMENT
This article explains the method, and the reasoning behind it, and more importantly it has links to some great videos and tools to help work out the math.
 
Omega, I did the OCW method my first time through RL-22. Two things: 66g was clearly the optimal charge weight, but the speed was so slow. And second, I can't seat my bullets .002 off the lands b/c my lands are at 3.42 and my magazine is at 3.30. My chrono has the 67.5g of 7828 averaging 2960 in 30 degree weather. -B
 
TNBillyEarl said:
Omega, I did the OCW method my first time through RL-22. Two things: 66g was clearly the optimal charge weight, but the speed was so slow. And second, I can't seat my bullets .002 off the lands b/c my lands are at 3.42 and my magazine is at 3.30. My chrono has the 67.5g of 7828 averaging 2960 in 30 degree weather. -B
Click to expand...
Yea, unfortunately sometimes (many) it ends up that way. Have you tried going from mag length in .001, .002 to see what it did to the groups?
 
Tikka magazines will allow the top round to be much longer than than the 3.3" box due to the way the mag is constructed. So I shot 3 shot groups at 3.40, 3.38, 3.36 and 3.34 with the RL-22 at 66g. A couple were under 1MOA. Nothing drastically better than what I was getting with a COAL of 3.29.

Back to the 7828, I'm happy with the speed now and with groups at .6 give or take. I just want them to group around my POA! This might become my hunting rifle and I really expect to put five shots with an inch of my POA at 200 yards, including my cold bore shot.

If I have hijacked this "what did you do at the bench" thread I apologize.

B
 
TNBillyEarl said:
View attachment 129044View attachment 129045View attachment 129046

MUP et al:

I'm shooting 160g Accubonds in a 7mmRM Tikka Superlite at 200 yards. I couldn't get RL-22 to be consistent so I switched to IMR7828ssc. Headspace is 2.122 in Rem Peters brass; Base to Ogive is 2.72. My Tikka has a long, long throat so I am keeping seating depth the same. The Base to Ogive is very close to the published 3.29 COAL. 67.5g of 7828 was twice under 1MOA last weekend - a .8 and a .6 group. This Saturday I went out to shoot a confirmation group and my barrel was warm when shooting the first pic (.42MOA). I came back Sunday after moving my scope 3 clicks right and 1 click down (Burris FF2 3-9x40). I shot five times. The second pic is the first three shots (.64MOA), the third groups shows shots 4 and 5 giving me a 1.5MOA. But why at 200 yards did my POI move so much? And why did it move up when I clicked it down? I need to get my POI w/i an inch of my POA, but I can't seem to do so? I don't really think my scope is bad, but that's all I can come up with... Any ideas are welcome. -B
Click to expand...
POA and POI can be shifting due to heat in the barrel. Some barrels can be much more sensitive to this. One thing that I learned years ago concerning scope adjustments is that some scopes "settle" after being adjusted. On my less expensive scopes I always dial past my desired adjustment by one click, then back up to where I wanted to be. It seems to help with the "settling" issue.
 

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