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Rifles, Reloading, Optics, Equipment
Reloading
Inconsistent Groups
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<blockquote data-quote="cfvickers" data-source="post: 518279" data-attributes="member: 25488"><p>I use a lot of 130 VLDs in my 6.5-284 and I use a carbon remover every 30-40 shots. I remove copper after about 100. This seems to work well for me. VLDs are sensitive to seating depth I am sure you have noticed. Go back over your reloading process and find your inconsistency. make sure you do exactly the same thing every time. Do you measure the OAL of every round? The first good thing I noticed you did was switch to winchester primers. some swear by CCI but the only consistent CCI primer I have found were magnums and that was in non magnum rounds. in summer back down to a standard primer. The powder is easier to ignite (to my understanding and experience) in higher temps of the summer. are the outside conditions the same from one day to the next when you are testing your loads? aside from temp check the barametric pressure at the nearest airport. Type in your zip code on weather.com and it will give you the pressure reading at the nearest airport with an ASOS system, then verify the difference in your altitude and that of the airport, from that look online to find how to calculate your pressure. if you are within 100 feet of altitude then there is no need to check it, it will get you close enough that it should not effect your shooting. bullets fly different when the pressure is different, and at some velocity/chamber pressure you will find a spot with the least deviation. Are you checking each shot on a Chronograph? These are a few subtle changes I have found to effect my groups that not everyone looks at. Again though, I would bet it is an inconsistency in your process somewhere. We all do it and have to check and recheck on a regular basis. Hope some of this helps. Some will say that I am sending you on a witch hunt with the pressures and what not, but I almost always find a discrepency when this is happening to me and I know my process is sound. Last thing, how much case stretching are you getting with each shot fired, and did you trim your cases. Failing to trim when needed is a sure fire group killer and can add pressure, the type of differences you are seeing. Been there and done that and the only way to find the issue is to go looking for it. a number of things can cause it. </p><p>Last but not least is your shooting form and rest. I have a 22-250 Encore rifle that absolutely will not shoot the same with any load on any given day as the day before IF I rest the fore end in a vice type rest. However if I just rest it on sand bags I will consistently get the same results. What brand of brass are you using? if it is remington, I suggest throw it away and get winchester, nosler, or just about anything but remington. RP brass tends to be soft and I have found it to be at near max length even before firing the first shot. In my 300 win mag it tends to stretch and need trimming after the first shot is fired. In that rifle it absolutely will not chamber until it is trimmed. Hope you get where you need to be. I am sure I repeated someone at some point here but only in the interest of being thorough.</p><p></p><p>Try some RL25 if 7828 isn't working for you. Accuracy trumps velocity in almost every instance. I am sure you know that, but it took me years to figure it out for myself.</p></blockquote><p></p>
[QUOTE="cfvickers, post: 518279, member: 25488"] I use a lot of 130 VLDs in my 6.5-284 and I use a carbon remover every 30-40 shots. I remove copper after about 100. This seems to work well for me. VLDs are sensitive to seating depth I am sure you have noticed. Go back over your reloading process and find your inconsistency. make sure you do exactly the same thing every time. Do you measure the OAL of every round? The first good thing I noticed you did was switch to winchester primers. some swear by CCI but the only consistent CCI primer I have found were magnums and that was in non magnum rounds. in summer back down to a standard primer. The powder is easier to ignite (to my understanding and experience) in higher temps of the summer. are the outside conditions the same from one day to the next when you are testing your loads? aside from temp check the barametric pressure at the nearest airport. Type in your zip code on weather.com and it will give you the pressure reading at the nearest airport with an ASOS system, then verify the difference in your altitude and that of the airport, from that look online to find how to calculate your pressure. if you are within 100 feet of altitude then there is no need to check it, it will get you close enough that it should not effect your shooting. bullets fly different when the pressure is different, and at some velocity/chamber pressure you will find a spot with the least deviation. Are you checking each shot on a Chronograph? These are a few subtle changes I have found to effect my groups that not everyone looks at. Again though, I would bet it is an inconsistency in your process somewhere. We all do it and have to check and recheck on a regular basis. Hope some of this helps. Some will say that I am sending you on a witch hunt with the pressures and what not, but I almost always find a discrepency when this is happening to me and I know my process is sound. Last thing, how much case stretching are you getting with each shot fired, and did you trim your cases. Failing to trim when needed is a sure fire group killer and can add pressure, the type of differences you are seeing. Been there and done that and the only way to find the issue is to go looking for it. a number of things can cause it. Last but not least is your shooting form and rest. I have a 22-250 Encore rifle that absolutely will not shoot the same with any load on any given day as the day before IF I rest the fore end in a vice type rest. However if I just rest it on sand bags I will consistently get the same results. What brand of brass are you using? if it is remington, I suggest throw it away and get winchester, nosler, or just about anything but remington. RP brass tends to be soft and I have found it to be at near max length even before firing the first shot. In my 300 win mag it tends to stretch and need trimming after the first shot is fired. In that rifle it absolutely will not chamber until it is trimmed. Hope you get where you need to be. I am sure I repeated someone at some point here but only in the interest of being thorough. Try some RL25 if 7828 isn't working for you. Accuracy trumps velocity in almost every instance. I am sure you know that, but it took me years to figure it out for myself. [/QUOTE]
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