Need a little help. Been reloading for a while and Im struggling!
- Thread starter Matt_3479
- Start date
Well I don’t know what’s going on! My scale must be off!!
today I loaded up 42.2grs which was showing in the last 2 ladders around the 3160ish range. I loaded .005, .020 and .040 off lands to test seating depth to fine tune. Rifle shot well, pulled one to open the group on the first .005. But the rest of the groups were all 1/2 moa or less with good es and good sd, but velocities averaged around 3102 today! 60 FPS change from one day to the next?
ive ruled out my magnetospeed as I had both the magneto and Labrador our today!
today I loaded up 42.2grs which was showing in the last 2 ladders around the 3160ish range. I loaded .005, .020 and .040 off lands to test seating depth to fine tune. Rifle shot well, pulled one to open the group on the first .005. But the rest of the groups were all 1/2 moa or less with good es and good sd, but velocities averaged around 3102 today! 60 FPS change from one day to the next?
ive ruled out my magnetospeed as I had both the magneto and Labrador our today!
Matt, I've seen some perty crazy velocity swings. How much did the atmosphere change form day to day? Barrel condition, clean / fouled? Equipment temperature, did it sit in the car with the heat on? How long before you fired it?, did it have time to climatize? All of it, gun, ammo, chrono gear. Position Chrono gear in exactly the same spot. Then the loads, only shoot half of your loads and then shoot the other half the next day. Food for thought, just saying I've seen velocity changes that I can't explain. If your getting the groups you like than just have fun and don't let the Chrono twist your brain. Cheers Mike
day to day the only major difference was wind. Direction and speed changed today. Other then that it was very similar, slight over cast, temps where within a few degrees (0 this morning, and 4 yesterday) gun and ammo both sat for 20 mins before firing and chronograph is in exactly the same spot, due to muzzle brake it’s position right up against it both times.
its the inconsistency that is bothering me. Like the rifle is starting to produce like I know it can. Little more fine tuning but I’d like to know that when I got out my drops will be closer together. Not 60fps difference
Dusty Stevens
Shiner
When the target talks everybody listens. Ive never seen anybody win a match with a chronograph
I for one totally agree Dusty.
The target above is saying 41.7.
bozo699
Gold $$ Contributor
Dusty,
I love your posts!... but..... with that thinking neither does precise tooling nor discussing all the things we do on this great forum! When I started competing in 2011 we saw a lot of 10 shot 8” groups @ 1000 yd and a 5” was awesome!... they have cut that number in half and then some!.... Brass hasn’t changed?... powder hasn’t changed?....bullets and primers haven’t changed and we haven’t bred super shooters in the last decade so what would you account for these unbelievable small groups your seeing today?...... I say it’s anal ocd people with precise tools ..... including chronographs!.... discussions shared by great shooters and lots of time at the range!.... it takes all of it buddy
Wayne
Glad to see you got it figured out Matt.
Philip
Philip
Dusty Stevens
Shiner
Like the top shooters say- barrels and bullets! Also, what cartridge were you shooting in 2011 and which one now? How bout the rests and how fast are the actions now? I see personal wind flags out now where it was rare back then. Cleaning regimens? Scopes? Lots of advancements along with the deletion of skyscreens (which is way way down on the list)
bozo699
Gold $$ Contributor
Dusty,
My first rifle was a stock Savage 6.5-284 and I can’t remember if it was the Benchrest or fclass and was shooting 140 vlds I was able to shoot moa with it. I rebarreled it to 6*284 and have used the same bullets every since in all my brx and dashers “105 vlds”
I started off with a Caldwell and now have a Fulgham , same flags scopes and cleaning equipment and the same 35p skyscreens
Wayne
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