Tenex by lot #
- Thread starter caz41
- Start date
When choosing lots, every rifle has a certain speed of ammunition that works best. It has to do with barrel harmonics, but I don't understand it well enough to explain it. My CZ likes 1081fps with SK Standard Plus with its 26" barrel.
But as far as I know, Eley is the only company that has the speed on the lot number. Of course I may be mistaken as I haven't learned how to "decode" what the lot numbers actually mean. At least Elwy makes the speed/velocity part easy to identify.
Like an old wives tale, it's an oft-repeated notion that's incorrect. Regardless of "speed," ammo shoots well or doesn't.
Lot number is just that, the number run on a certain machine before the machine was stopped. Example Tenex 1022-04031. 10 stands for Tenex, although now that they use the same bullet with the same BC Match also starts with a 10, used to start with 11. 22, year of manufacture, 2022. 04, machine #4 at the plant. 031, the 31st lot that machine produced in 2022. Most barrels show an obvious preference for a speed range. Example some shoot better with ammo in the 1070/1080fps range, some prefer 1100/1110...you'll see a distinct preference if you chrono your ammo and keep record of results, then buy and lot test based on speed preference. Eley rated fps is shot with 26 inch test barrels, so it's always faster than the box rating, sometimes by a considerable amount depending on your barrel manufacturer. I chrono'd a lot of Tenex today out of 2 different rifles, 3 10 shot strings from one averaged 1087FPS, the other averaged 1112FPS...this from a 1067FPS rating on the box. SD was similar from both guns, ES was a bit higher from the faster barrel, yet it grouped very well at 50yds anyway, but didn't match the other at 200yds. The end results on paper at distance is what matters, buy a few boxes, test quickly, and hope a few bricks are still available after testing. Rinse and repeat when you run out.
Lapua has the velocity, is in m/s:
Lapua Rimfire Lot Numbers
Current Lapua rimfire ammo lot numbers are composed of eleven (11) digits, five (5) digits followed by a forward slash, followed by another six (6) digits. The five digits before before the forward…
www.ocabj.net
Thank you 6.5SH!!!Lapua has the velocity, is in m/s:
Lapua Rimfire Lot Numbers
Current Lapua rimfire ammo lot numbers are composed of eleven (11) digits, five (5) digits followed by a forward slash, followed by another six (6) digits. The five digits before before the forward…
As a national class shooter informed me, you add the number 3 to the front of the first two digits of the Lapua series of numbers. Then you go to your cell phone or computer as ask to convert that 3XX mps to fps. And there you go.Lapua has the velocity, is in m/s:
Lapua Rimfire Lot Numbers
Current Lapua rimfire ammo lot numbers are composed of eleven (11) digits, five (5) digits followed by a forward slash, followed by another six (6) digits. The five digits before before the forward…
For general information the Lapua rimfire lot number information in www.ocabj.net above has room for more accuracy. The information suggests that what's claimed to be the "actual lot number" increases incrementally, which is to say it goes up with each lot produced. (See the top image below.)
Referring to the bottom image, the actual lot number includes both sides of the slash (/) and the right side includes identification of the loading machine used to produce the ammo. There are at least three loading machines, numbered 5, 6, and 7. Note that the information concerning the number of cases produced for any lot is found only on the case itself, not on a box or brick.
Referring to the bottom image, the actual lot number includes both sides of the slash (/) and the right side includes identification of the loading machine used to produce the ammo. There are at least three loading machines, numbered 5, 6, and 7. Note that the information concerning the number of cases produced for any lot is found only on the case itself, not on a box or brick.
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See if I understand. 24558/706635 velocity is 324mps (converts to 1063fps), 5=center-x (which it is), 5+8=13 (so I assume 2010+13=2023 manufacture date?)For general information the Lapua rimfire lot number information in www.ocabj.net above has room for more accuracy. The information suggests that what's claimed to be the "actual lot number" increases incrementally, which is to say it goes up with each lot produced. (See the top image below.)
Referring to the bottom image, the actual lot number includes both sides of the slash (/) and the right side includes identification of the loading machine used to produce the ammo. There are at least three loading machines, numbered 5, 6, and 7. Note that the information concerning the number of cases produced for any lot is found only on the case itself, not on a box or brick.
In my stash of two bricks plus one odd box, none have a case mark...so would that indicate only one case was manufactured?
As noted, the number of cases produced for any lot is found only on the case label that gets put on each case (the box that holds the ten bricks that are in each case).
By looking at a brick there's no way to know how many cases of the lot were produced.
Below is another example of a case label found on the case itself.
Thank you for that info....I never had and probably (at my age) not will buy by case lots. Will stick with bricks and then complain I cannot find any more of 'that great lot' I had.
I can’t seem to shoot the difference between the Lapua stuff loaded around the 1100fps mark so maybe you won’t be complaining so long as you find the speed your barrel likes and stick with across different lots/loads.Thank you for that info....I never had and probably (at my age) not will buy by case lots. Will stick with bricks and then complain I cannot find any more of 'that great lot' I had.
I find this point interesting. As I experimented with action screw torques and action bedding my rifle changed it's 'like' from lower velocity 1050's to 1090's relative to accuracy. Unfortunately I haven't yet created a cause/effect formula....will keep trying though.
I wonder if all this lot testing I’m sorta doing will be invalidated by moving to another chassis shortly…
Let me know what you find....it might validate what I said in my last post. LOL
@Dstoenner Can you advise me where RWS shows the speed? I have several bricks and would like to know.
Thanks
This is a recent practice. It has to be the black boxes version. I think i have seen some of the earlier black boxes without also. It is also not on the brick box but the 50 count boxes on one side in the upper right corner
Opps...just re-read your earlier post..RWS R50 and R100!
I am looking at RWS Rifle Match and the speed is not printed on the boxes.....the lot number and date is embossed on one of the flaps however.
61QT21 My understandings is that equates to the 22nd of July 2024 production run 21. Makes sense since I bought it just this month.
Since RWS's website states: "Lot number - The lot number or batch number is printed on the smallest packaging unit of cartridges.
All cartridges of one lot number are manufactured with identical components within one day."
I have some RWS Rifle Match from earlier that I didn’t see a lot number on, but luckily it shipped in the case and that has what I think is a lot number? Either way I don’t have enough to really make it worth keeping.
It will impact the results as the overall response of the system will have been changed due to swapping the stock.
The Merango test center now tests with the action in the stock unless otherwise requested by the Customer. They have a one-piece type BR rest in place of the large vice / fixture..
That doesn't necessarily preclude picking the best lot of ammo but it doesn't change the fact that 1813Benny pointed at ... you cannot be certain that things will not change significantly in another stock/chassis. Just because they use action fixtures is no proof that it is the best practice.
What doesn't change, whatever the stock or chassis, is the barrel. It will do what it can with the ammo it gets.
FWIW, the Lapua Rimfire Test Shooting website, as well as Capstone's "Important Notes About Testing" still indicate at this time that, unless requested by a customer, the barreled action is removed from the stock and mounted in a "precision machined bedding block".
FWIW, the Lapua Rimfire Test Shooting website, as well as Capstone's "Important Notes About Testing" still indicate at this time that, unless requested by a customer, the barreled action is removed from the stock and mounted in a "precision machined bedding block".
