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Rifles, Reloading, Optics, Equipment
Reloading
Custom Load Development
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<blockquote data-quote="LRHunter" data-source="post: 462507" data-attributes="member: 29905"><p>Thx for the input Grumulkin, much appreciated and duly noted. Couple comments. </p><p> </p><p>Liability - I am not sure what liability you are referencing, please elaborate as I may be thinking one thing and you another. </p><p> </p><p>Cleaning - A good cleaning after each shot or three 3 shot group is debatable as I have known some shooters who clean their barrell relentlessly and found that their first few shots were off, then accuracy improved, then fell off 10-15 shots later. I believe it varies from rifle to rifle. But, yes, I agree, a good cleaning takes time and patience and should be done. If I do this, I am thinking I will clean after each yardage sample. </p><p> </p><p>Skyscreens - Agreed, big issue, I am working with my someone to use some AR 500 steel plates to protect them.</p><p> </p><p>Conditions - I agree with you on changes in atmospheric conditions, however, Loadbase allows you to adjust for sight-in conditions (i.e. conditions during the time of data collection) and field conditions . In addition, it allows me to take multiple samples of muzzle velocity and final velocity readings, screen ditances, etc to accurately calculate corrected velocity and BC at specific sight-in conditions. Therefore, if those conditions change out in the field, which they will, the software compensates for this. To take this a step further, since muzzle velocity also changes substaintially with temperate, there is a buildt in regression module that allows you to take 4 temperate samples throughout the year and input them into Loadbase to determine what the adjusted muzzle velocity would be even if you havent shot and tested at the temperature. You then take the adjusted muzzle velocity, input it into your ballistics for the temperature you are shooting at for the proper adjustments.</p><p> </p><p>Barrell Wear - Shooters can never adjust for this other than deal with it on the fly as well as many other factors involved at long range shooting. </p><p> </p><p>Uneccessary & Futile - This is the response that I want to hear from the pros as I do not want to do something that is unneccessary. Having said that, it has always been my understanding that BC's (and obviously muzzle velocities "MV") are different from rifle to rifle. However, someone told me that BC's dont change only trajectory changes (MV). This confused me. If BC's don't change, just MV, then theoritically you could take the advertised G7 BC from bullet manufactuer not G1 (as it is velocity dependent), measure just your MV at specific atmospheric conditions (not terminal velocity at the target) and input that along with bullet manufacturers advertised DC (Drag Coeff) and you should be spot on (provided you properly compensated for wind, coriolis, cant, etc). If so, then I agree, that would make my work futile, please confirm or clarify this as this is where I am getting a but fuzzy. And remember, that Loadbase does allow for compensating for sight-in vs field data.</p><p> </p><p> </p><p>Thanks in advance.</p></blockquote><p></p>
[QUOTE="LRHunter, post: 462507, member: 29905"] Thx for the input Grumulkin, much appreciated and duly noted. Couple comments. Liability - I am not sure what liability you are referencing, please elaborate as I may be thinking one thing and you another. Cleaning - A good cleaning after each shot or three 3 shot group is debatable as I have known some shooters who clean their barrell relentlessly and found that their first few shots were off, then accuracy improved, then fell off 10-15 shots later. I believe it varies from rifle to rifle. But, yes, I agree, a good cleaning takes time and patience and should be done. If I do this, I am thinking I will clean after each yardage sample. Skyscreens - Agreed, big issue, I am working with my someone to use some AR 500 steel plates to protect them. Conditions - I agree with you on changes in atmospheric conditions, however, Loadbase allows you to adjust for sight-in conditions (i.e. conditions during the time of data collection) and field conditions . In addition, it allows me to take multiple samples of muzzle velocity and final velocity readings, screen ditances, etc to accurately calculate corrected velocity and BC at specific sight-in conditions. Therefore, if those conditions change out in the field, which they will, the software compensates for this. To take this a step further, since muzzle velocity also changes substaintially with temperate, there is a buildt in regression module that allows you to take 4 temperate samples throughout the year and input them into Loadbase to determine what the adjusted muzzle velocity would be even if you havent shot and tested at the temperature. You then take the adjusted muzzle velocity, input it into your ballistics for the temperature you are shooting at for the proper adjustments. Barrell Wear - Shooters can never adjust for this other than deal with it on the fly as well as many other factors involved at long range shooting. Uneccessary & Futile - This is the response that I want to hear from the pros as I do not want to do something that is unneccessary. Having said that, it has always been my understanding that BC's (and obviously muzzle velocities "MV") are different from rifle to rifle. However, someone told me that BC's dont change only trajectory changes (MV). This confused me. If BC's don't change, just MV, then theoritically you could take the advertised G7 BC from bullet manufactuer not G1 (as it is velocity dependent), measure just your MV at specific atmospheric conditions (not terminal velocity at the target) and input that along with bullet manufacturers advertised DC (Drag Coeff) and you should be spot on (provided you properly compensated for wind, coriolis, cant, etc). If so, then I agree, that would make my work futile, please confirm or clarify this as this is where I am getting a but fuzzy. And remember, that Loadbase does allow for compensating for sight-in vs field data. Thanks in advance. [/QUOTE]
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