Originally posted by NugginFutz
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Free 6.5 Grendel Reload Data
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Another interesting aspect of this collected data is how well the loads track the predicted loads in the Optimal Barrel Time (OBT) spreadsheet (except BHW). Not all loads are predicted but many many are especially loads reported by multiple people that are in the 120 to 123gr range. That satern Grendel II especially seem to track the predicted loads for whatever reason. BHW does not most likely do with the poly rifling.
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Originally posted by barrelcactus View PostThe SAAMI is one option and is not magic.
As it is now the SAAMI is a great option as long as your not one of the unlucky ones with stuck bullets like have been reported on here over and over.
Like Drillboss said, the confusion created by all the other chamber and bolts was/is frustrating and could/should have been avoided.
However, my biggest issue is that business owners chose to take advantage of another business owners hard work and investment. And some even had the nerve to use "Grendel" in their name. I have a little more respect for Les Baer for having confidence enough to use his own name.Knowing everthing isnt as important as knowing where to find it.
Mark Twain
http://www.65grendel.com/forum/showt...2-Yd-Whitetail
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Originally posted by rabiddawg View PostTo be fair the bastardized chambers are not magic either. And they certainly Are Not immune to sticking bullets.
Like Drillboss said, the confusion created by all the other chamber and bolts was/is frustrating and could/should have been avoided.
However, my biggest issue is that business owners chose to take advantage of another business owners hard work and investment. And some even had the nerve to use "Grendel" in their name. I have a little more respect for Les Baer for having confidence enough to use his own name.
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Originally posted by barrelcactus View PostAnother interesting aspect of this collected data is how well the loads track the predicted loads in the Optimal Barrel Time (OBT) spreadsheet (except BHW). Not all loads are predicted but many many are especially loads reported by multiple people that are in the 120 to 123gr range. That satern Grendel II especially seem to track the predicted loads for whatever reason. BHW does not most likely do with the poly rifling.
https://docs.google.com/spreadsheets...uvM/edit#gid=0
The text at the top of the sheet makes the disclaimer:
"The following is software generated loading predictions using the Optimal Bullet Time (OBT) method. Some of these predictions are right on the money but some maybe way off. Use this as a reference but work up a load as normal. This is not load data this is just a prediction do not just load the predictions. Predictions are formulated with an assumed 70 degrees F. The data is for a 22in Satern Grendel II with 5R 1/8 rifling."
So, I'm curious, what advantage does this spreadsheet provide the reloader? If it really can't be used as a predictor, why not just use the published load data and work us as usual?
BTW - does Craig know you're sharing this data over here?
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The data is free and is allowed to be shared all over thats the point. One of the guys has a relationship with Sierra and they provided a selection of bullets to a group on the facebook page. They have a selection of SAAMI, 264LBC and Grendel II barrels so the spreadsheet should get filled in more with more Sierra loads.
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Barrelcactus, Thanks for posting I like using the QL predictions as a starting point and adjusting for refinement. I have found OBT to be helpful on finding useable nodes. By using that data, I am generally close, so it saves a lot of powder and bullets in the ladder development. Thanks again.
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Originally posted by IceAxe View PostBarrelcactus, Thanks for posting I like using the QL predictions as a starting point and adjusting for refinement. I have found OBT to be helpful on finding useable nodes. By using that data, I am generally close, so it saves a lot of powder and bullets in the ladder development. Thanks again.
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Originally posted by rickOshay View PostThanks for sharing this.
The text at the top of the sheet makes the disclaimer:
"The following is software generated loading predictions using the Optimal Bullet Time (OBT) method. Some of these predictions are right on the money but some maybe way off. Use this as a reference but work up a load as normal. This is not load data this is just a prediction do not just load the predictions. Predictions are formulated with an assumed 70 degrees F. The data is for a 22in Satern Grendel II with 5R 1/8 rifling."
So, I'm curious, what advantage does this spreadsheet provide the reloader? If it really can't be used as a predictor, why not just use the published load data and work us as usual?
BTW - does Craig know you're sharing this data over here?
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Originally posted by rickOshay View PostCan someone explain why this OBT data only works for some bullet weights and not others; some rifling and not others; some chambers and not others ?
Is it also affected by barrel contour? Fluting? Muzzle devices?Last edited by Guest; 05-14-2017, 05:42 AM.
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