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In another thread, "New Press," where the OP asks about the Dillon Super 1050 versus the Hornady LNL AP, during the discussion several reloading rates are quoted for various progressive presses. The differences in rate didn't make sense to me. One supposed advantage of the 1050 is 1200 rounds per hour, while the LNL is 500 to 600.
I wondered, how could presses that are essentially the same design, with the same case feeding, bullet feeding, powder metering and priming features, with basically the same reservoir capacities, have such dramatically different production rates?
The conclusion I have come to is that they don't, the are basically the same. The difference in in how one measures, or "rates" the production capacity.
I bet that Dillon is quoting an instantaneous production rate, i.e., time per round when all of the reservoirs are full, extrapolated to a one hour rate without considering time to refill primers, powder, cases, and bullets.
Similarly, I bet Hornady is quoting a sustained, i.e., one-hour production rate, taking into account the time to refill the reservoirs.
As a check on this, note that Dillon quotes a production rate for for the 550B - manually indexed press without case and bullet feeders - that covers Hornady's quoted production rate for the LNL, "400 to 600" rph v. "up to 500" rph, respectively.
Thinking about this I found many youtube videos that show folks cranking out rounds on the LNL at 3 seconds per, i.e., the 1200 rph rate.
So, have you ever considered what a good standard for measuring production rate might be? For example, how many primer tubes would you have on hand, and how do you refill them? How quick to change a primer tube? I'm thinking that if you have bullet and case collators that the long pole in the tent is primer feeding. In addition, does one count the time required to dismount, refill, and remount a primer tube in the one-hour production rate, as well as refill the powder hopper, and case and bullet hoppers?
I think useful rates would be the instantaneous rate; the 100 round rate, i.e., without counting time to refill reservoirs; and the one-hour production, which would count all reservoir filling time.
Conclusion: 1050 is no faster than LNL, they are just rated differently.
Discuss?
I wondered, how could presses that are essentially the same design, with the same case feeding, bullet feeding, powder metering and priming features, with basically the same reservoir capacities, have such dramatically different production rates?
The conclusion I have come to is that they don't, the are basically the same. The difference in in how one measures, or "rates" the production capacity.
I bet that Dillon is quoting an instantaneous production rate, i.e., time per round when all of the reservoirs are full, extrapolated to a one hour rate without considering time to refill primers, powder, cases, and bullets.
Similarly, I bet Hornady is quoting a sustained, i.e., one-hour production rate, taking into account the time to refill the reservoirs.
As a check on this, note that Dillon quotes a production rate for for the 550B - manually indexed press without case and bullet feeders - that covers Hornady's quoted production rate for the LNL, "400 to 600" rph v. "up to 500" rph, respectively.
Thinking about this I found many youtube videos that show folks cranking out rounds on the LNL at 3 seconds per, i.e., the 1200 rph rate.
So, have you ever considered what a good standard for measuring production rate might be? For example, how many primer tubes would you have on hand, and how do you refill them? How quick to change a primer tube? I'm thinking that if you have bullet and case collators that the long pole in the tent is primer feeding. In addition, does one count the time required to dismount, refill, and remount a primer tube in the one-hour production rate, as well as refill the powder hopper, and case and bullet hoppers?
I think useful rates would be the instantaneous rate; the 100 round rate, i.e., without counting time to refill reservoirs; and the one-hour production, which would count all reservoir filling time.
Conclusion: 1050 is no faster than LNL, they are just rated differently.
Discuss?