Stupid questions

Daleo8803

Daleo8803

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I have a few random questions.

I need a light for my bench. I was going to put up one of those 4ft Florence lights but I read that they can affect my digital scale? Is that true?

I'm wanting to reload for my mosin. Last time it was with my Smith I had him slug the barrel. He said it was .3085. so use .308 bullets. He has been building custom rifles for almost 40 years so I trust him. I have some SMK 174gr in .308. should I try a different bullet? I have never loaded rifle before.

The case length, how close do you have to be? If it says 2.5" can it be 2.49?

Powder recommendations for 7.62x54r

I think that's all ATM :)
 
You can eliminate any possibility of electrical interference with your digital scale by switching to road flares for lighting.

;)

Seriously, I honestly doubt this claim of interference. But it's easy enough to test. Didn't your scale come with a calibration weight? Check it out under the new lights and see if it's still reading as it should. Or, if you don't have a calibration weight, use anything else that is handy...weigh it away from your new light, then weigh it again under your new light. If there's no change, you're good to go.
 
.308 should be ok with a groove dia of .3085, may give up a touch of velocity.

Would think, but not know, that any powder good for .308Win or 30-06 would be ok. Could check a book later if no one has any by then.

Case length a hundreth or two short won't hurt a thing. Is that after sizing?

ETA he didn't mention the bore being tighter anywhere did he? Tight spots aren't unheard of, if it is closer to .312 near the chamber or over most of the length you'll give up a more velocity and possibly/probably accuracy.

Sent from my SM-G360V using Tapatalk
 
Last edited:
Beef15 said:
.308 should be ok with a groove dia of .3085, may give up a touch of velocity.

Would think, but not know, that any powder good for .308Win or 30-06 would be ok. Could check a book later if no one has any by then.

Case length a hundreth or two short won't hurt a thing. Is that after sizing?

ETA he didn't mention the bore being tighter anywhere did he? Tight spots aren't unheard of, if it is closer to .312 near the chamber or over most of the length you'll give up a more velocity and possibly/probably accuracy.

Sent from my SM-G360V using Tapatalk
Click to expand...

Case length after sizing. That's when you trim right?

He did not mention any tight or loose spots.
 
After sizing, yes, bottlenecks grow slightly in length when resized. Since you don't headspace off the rim you really can't go too short until you run out of neck tension. That said I try to stay real close to the "trim to". For repeatability uniformity matters more than exactly X.

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I have 3 electronic scales (Frankford, Gemini20, and Chargemaster) and none of them are affected by the five 4-tube florescent fixtures in my shack.

Having said that, some old fixtures could have ballasts that create a lot of electrical noise. Battery powered scales would be less prone to interference as there is not a direct electrical connection (conducted path), but you could still get interference to radiate from the fixture. Modern fixtures have to meet compliance standards now, so it is not the problem it may have been years ago.

LED fixtures are not the cure-all that most people think. While a LED in a traditional application (DC powered, current limiting resistor) does not generate any EMI, most AC powered LED bulbs or fixtures contain switch mode power supplies that can generate their own EMI. I know this because I used to work in EMC compliance and have seen LED fixtures fail emissions standards. I've tested electric golf carts, with pulse modulated motor controllers, pass radiated emissions testing but then fail miserably when the LED headlights were turned on.

The best thing to do is what @RetiredUSNChief suggested, test your scale with known weights, with the lights off and then on.
 
I have a chargemaster scale that acts weird from time to time, it will weight the shadow of my hand with reasonably good repeatability. Haven’t figured out the source of the problem yet, but am blaming the fluorescent lights because everyone else does.
 
JimB said:
I have a chargemaster scale that acts weird from time to time, it will weight the shadow of my hand with reasonably good repeatability. Haven’t figured out the source of the problem yet, but am blaming the fluorescent lights because everyone else does.
Click to expand...
Peter?
 
Varget, Reloder 15, and IMR4895 are all good powders shown in Lyman for bullet weights under 200gr. While accurate they are stick and meter somewhat poorly.

Check Ramshot's website and see if Tac is listed, it meters great. Also MR2000 from Alliant, and CFE223 from Hodgdon, meter well, if you can find data, they usually work in the same cartridges as the ones I found data for.

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