Powder Question (Where to find info?)

yoodle dog

yoodle dog

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How would I find out how many grains of powder would be in a certian factory load? I found a rifle recoil calculation and I want to calculate my gun's recoil. I need to know how many grains of powder are in Winchester Supreme 7mm WSM 140 grain Ballistic Silvertips. Or tell me where I can find this info. Thanks!
 
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I would think the fastest way would be to pull a round and weigh it. But knowing how much it weighs won't tell you what it is. If they have any secrets I would think their load info would be one of them??
 
Even if you pull the bullet and weigh the powder, there is no way of knowing what grade of powder is used as this is a trade secret and they frequently use powders that are not available to reloaders, this is going about load development backwards.
 
Two exact same rifles from the same maker in the same caliber may be different. Allot depends on the bore dia, tightness of the chamber, amount of bullet jump into the lands, condition of the bore. This will also give different velocities in the 2 rifles with the same ammo. Even different lots of ammo/powder/primer could change things quite a bit. To put an exact # to this value would be almost impossible. The link above will give you a ballpark number.
 
All I am trying to do is get a ball park to see if my BLR chambered in 270 win kicks more than my M-1000 eclipse chambered in 7mm WSM.
 
yoodle dog

All I am trying to do is get a ball park to see if my BLR chambered in 270 win kicks more than my M-1000 eclipse chambered in 7mm WSM.


Why?? Just curious...

N_R
 
In the WSM, it's probably a safe bet to estimate 62 grains of powder. You shouldn't be off by more than 5grs in either direction. 5 grs of powder won't have a significant impact on the recoil calculator
 
Nissan_Ranger said:
yoodle dog

All I am trying to do is get a ball park to see if my BLR chambered in 270 win kicks more than my M-1000 eclipse chambered in 7mm WSM.


Why?? Just curious...

N_R
Click to expand...
It just seems the 270 kicks more than the 7 mm WSM! I want numbers to kinda prove if I am nutz or not.
 
recoil is a very subjective thing, and a LOT of factors come into play (more than just the obvious physics ones). It's not 'provable' with numbers, or, if it is, it would be an enormously huge formula that I haven't personally seen anywhere
 
In that case, you're going about it the hard way; simply figure out the energy produced by each load ( http://www.reloadammo.com/footpound2.htm ), which needs you to enter the bullet weight and velocity. There are a couple of things that will influence FELT recoil, though; does one rifle have a simple buttplate, while the other has a ventilated pad? (the padded rifle will feel like it recoils less.) Is one rifle lighter than the other (the lighter rifle will feel like it recoils more.) etc.
 
That formula will give you a more precise figure (it ends up adding the weight of the gunpowder into the equation), but it's such a small difference that I doubt you'd even be able to FEEL it. Unless you've got a scale to weigh the powder from a pulled round, you wouldn't be able to fill in that formula anyway. (if you've got the other info, you can just fill in "0.0" for the weight of the powder).
 
The shape and your fit to the stock and your hold has alot more to do with felt recoil. I can tell you my buddy's Tikka T3 in .300 WinMag synthetic stock hits me harder then my Remington 700 in .300 WinMag and factory wood. Maybe the Remington just fit me better? I never did see if there was much difference in weight of the two.
I make an aluminum target stock that is fully adjustable that will make a .308 recoil like a .223.
 
The only way is to pull one and weigh it. Manufacturers don't advertise their loads. The powder charge can vary from lot to lot as well. They don't use powders you can get anyway.
Most manuals will have a factory duplication load listed. At least my Lyman book does.
 
that depends on the manufacturer- i've got powder manuals from both winchester and remington over the years that show factory loads ( ie for 45 colt winchester shows 7.1 of 231 with a 255 grain lead bullet) and they're listed on their web sites as well - sometimes with a pressure figure as well
 
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