silverhair
Well-Known Member
How are your results today? Inquiring minds want to know. ;-)
Accurate load falls apart after 100
- Thread starter Grizz1148
- Start date
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How are your results today? Inquiring minds want to know. ;-)
Satterlee Scott
Well-Known Member
This time of year? What was the mirage like?
Grizz1148
Well-Known Member
Mirage was minimal. Not a mirage issue.
Yuppers. Just got the same this week. Playing with seating depths. COAL MAX 2.80....SHOOTING real well, just touching lands at 2.80. A little stiff to load. .250 at 100
.375 at 300. Loaded five at 2.794...group opened to 3.8"@ 300....
Skip, are you saying you set your bullet back .006 and it upset your group 3.425" ? or is there a typo?
trappers son
Well-Known Member
- Joined
- May 19, 2012
- Messages
- 59
Your barrel is running outta life... You have a loose action, scope ,mount, that is causing an larger variation in poi at range, the bullets might be way outta align concentricity could be way out and causing it... They would have to be 10 thousandth or more though.... Accidentally put different powder charges in cases or your scale is acting up.... Double check it with a second scale... Shooter error.... That about covers the possibilities.... Run through and retest with a fresh batch of loads after you tighten everything down on your rifle and clean out the barrel really good.... If it still shoots like **** it's your load or barrel... If it shoots good it was your previous loads if everything was tightened down without movement and your barrel wasn't too dirty.
That's correct! Shocked me.... I've been reloading 44 years
wow! that will make a guy think.
Given a stable bullet/twist, the only times I have experienced "consistently" tight groups/low ES at 100 yards, and the described type of deterioration, at 200-300 yards(ruling out a crazy wind), the issue has been the scope(parallax, turrets, or power ring), or, a change in rifle support(ie faulty front/rear rest) to accommodate the longer distance which introduced instability. IMO, for the groups to change so radically in such a short range span, it implies a mechanical influence as a result of increasing the distance. Occurring with different bullets is a tip-off.
snookntarpon
Well-Known Member
Try running a q-tip around the crown.. I had a rifle do something similar and I had a small burr on the crown. the burr will catch the cotton on the q tip. No clue how it got there but i must have hit it at some point. no noticeable ding, just a burr that i could not see with the naked eye.
Grizz1148
Well-Known Member
I'll try that but I've never shot or carried it anywhere without the brake on it.
snookntarpon
Well-Known Member
well, mine had no brake...
Crazy, but I would look at slumping. The bullet is changing shape due to perhaps a tight barrel, to fast of rotation and speed or perhaps you found the magical formula where all three contribute. Slumping is not a new phenomena.
Load down to another node and retest your different ranges. If "group opening" is not happening you may be on to something. My two bits.
Load down to another node and retest your different ranges. If "group opening" is not happening you may be on to something. My two bits.
TwoMore
Well-Known Member
Check your brake for any lip that will form on the edges of the bore from the blast, I usually have to "hone" my brakes after 200 to 300 rounds also if the brake is close to the crown I have had the blast damage the crown
