Weight of Scenars off?

[midmoguy]

I have a box of 155 scenars I got from Midway a few months back. After doing some development, I was playing around with the bullets on the scales. I get anywhere from 154-154.4 grains. thinking this was odd I double checked it with another set of scales, and put some bergers on the scales which came out to their listed weight. I was just curious if I had a weird batch, or this was a common thing. I didn't want to buy a new box and them be different. Has anyone else experienced this before?

 

[ChrisGarrett]

I would venture to guess that being within +/- a half percent, is pretty good for a man made object. Why you had them all weigh in between 154 and 154.4, I can't say.

Chris

 

[EMorr]

Well I don't work for Lapua so I can only offer a guess, but on the reloading data pages they list the bullet weights in grams first and then grains when read from left to right. The 155's are shown at 10.0 grams converts to 154.32 grains. Again I'm only guessing here but perhaps Lapua actually measures their product in grams and then converts it to grains for us shooters, as that is what we are used to dealing with, aslo perhaps when they end up with a weird number they simply round up or down to a more common number.

Or maybe you just got some slightly bullets, who knows.

 

[ChrisGarrett]

Well I don't work for Lapua so I can only offer a guess, but on the reloading data pages they list the bullet weights in grams first and then grains when read from left to right. The 155's are shown at 10.0 grams converts to 154.32 grains. Again I'm only guessing here but perhaps Lapua actually measures their product in grams and then converts it to grains for us shooters, as that is what we are used to dealing with, aslo perhaps when they end up with a weird number they simply round up or down to a more common number.

Or maybe you just got some slightly bullets, who knows.

You're absolutely right and I've got tons of boxes of Lapua .308 and .338 bullets, going back years and the primary/controlling weight is in grams and usually in full increments like 12.7g, etc..

Chris

 

[midmoguy]

Well I don't work for Lapua so I can only offer a guess, but on the reloading data pages they list the bullet weights in grams first and then grains when read from left to right. The 155's are shown at 10.0 grams converts to 154.32 grains. Again I'm only guessing here but perhaps Lapua actually measures their product in grams and then converts it to grains for us shooters, as that is what we are used to dealing with, aslo perhaps when they end up with a weird number they simply round up or down to a more common number.

Or maybe you just got some slightly bullets, who knows.

Hmmm that makes alot of sense and somehow never occured to me. I will flip the scales over to grams tomorrow and I bet youre right

 

[peaceatwar]

I got much more variation then that out of my 155 scenars. I will have to weigh them again for the specifics but I was seeing > 1gr of variance as an ES.

 

[ksthomas]

Midoguy,

Yes, all Lapua products are spec'ed in Metric, not Imperial units, and are converted for English language publication. I'd need to check with the Finns and verify the actual specs (in both Metric and Imperial units), but if there's an issue, we'll be more than happy to make it right for you. As I'm sure you know, all manufacturers have to operate within a certain tolerance range, +/- a certain weight. Normally, this is something on the order of +/- .3 grains, for a total of a bit over one half grain variation. We do try to keep things tighter than this, but there's always some variance with any projectile due to the number of factors that go into a bullet's production.

If you have any other questions or problems, feel free to contact me directly, and we'll get it resolved for you, no problem.