Bullet brand weight question

P

Potasz

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New to reloading
Trying to have all question answered before I start

Question is
Is the powder amount going to be the same for
A Barnes tsx 130 gr bullet(.277)
As a hornady sst 130 gr bullet(.277)
Or a nosler 130 gr ect ....
All bullets a same shape and weight


Or do you have to develop a different load for each bullet

Thanks for your help
K
 
Your starting load will be the same.
You will need to work up to an appropriate load, watching for pressure signs as you go, with each. As their construction, length and B.C vary greatly.
 
For the same OAL, the lead free bullet (all copper) will be much longer than it's jacketed counterpart so it will need less powder to achieve the same pressure level.
 
Baribal said:
For the same OAL, the lead free bullet (all copper) will be much longer than it's jacketed counterpart so it will need less powder to achieve the same pressure level.
Click to expand...

Not necessarily true, there is more to it than that. For example, some of the monometal bullets with grooved shanks have much less bearing area. I find that the velocity is similar with the same powder charge for both monometal, ,and cup and core bullets, in some of my rifles.
 
With an appropriate starting point, most loads can be extrapolated.
The most accurate loads from Nosler and Sierra will generally be good indicators from my experience.
As stated by SJ, similar velocities may be what your rifle is looking for and that extra grain may be the answer when finding that one node of accuracy.
Recoil and barrel vibrations are based on powder weight, bullet weight, rifle weight, etc. and there is a formula.
Accuracy in my 22-250 using the 60 grain Sierra HP is very similar with IMR 4895, 4064 and 4320 within a range of 33-34 grains.
 
It'll be different for the Barnes bullets. Solid copper doesn't fly the same way a lead core bullet does. It'll also be different according to the cartridge. And whose data you have. IE a .270 Win 130 TSX with IMR4350 starts at 50.0 according to Hodgdon. 56.0 according to Barnes.
Hodgdon also says a 130 Barnes max load will be compressed with the same amount of powder as a Hornady 130 SP. The Barnes bullet length will be longer due to the mass difference between lead and copper. Hence, the seating depth will be slightly different.
Compressed loads are nothing to worry about though.
However, the loads are very close, so no you don't have to work up a load for each. No matter how much fun it is.
 
I tried a 180 gr SST and a 180 gr Speer deep curl over the same charge of H4350 in my 30-06
and they went the same speed so I'll assume the same pressure.
I tried the same charge with a 180 gr partition on another day (with out the chronograph) ,
STUPID idea. The bullet landed about 6" high and the recoil was noticeably heavier.
There's a reason you are supposed to work up when substituting components.
IMHO cup and core bullets are less likely to cause trouble when substituted (but they can),
and there is a solid shank in every Partition.
 
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