brass question

[hollywood]

Can different brand brass with identical powder, charge, bullet,etc change poi?  .308 zero with win and tried hornady match poi change 1in right. 

[jeffreyC]

Different brands of brass have different capacities which changes pressure with the same load, which changes velocity, which changes trajectory.

[JMoto]

at shorter ranges the change will be minimum, unless money is on the line and you are not pushing max loads, you can get away with mixed brass or brass from different lots.

[planeflyer21]

What they ^^^ said, hollywood.

With most "plinking" handgun loads, I have piles of mixed brass, all with starting loads or a pinch higher than that.  Never close to maximum.

For serious loads, every case is identical, same brand, worked up to satifactory levels of THUMP for the intended purpose.

Lil'Gun in .357 Magnum and .45 Colt is the cat's mee-ooowwww!

Jon

[edgecrusher]

Very interesting, good info men  <thumbsup>

[Tripledeuce]

  Different brands of brass are made out of different mixtures of "brass".  That causes different expansion rates in the brass.

  Also, different neck thickness DOES cause different pressure on the bullett, and different relese of the bullett.

    Neck turned cases relese the bullets differently than non turned cases.

    Short answer, I have personally noticed diffetent poi from different brands of brass with several different weapons.

  Respectfully

  Terry

[survivalshop]

For serious target ,hunting loads , I weigh (digital scale ) all my brass (by brand ) & I can get quite picky , but the results show it.

[unforgiven]

Guy next to me at the range was handloading and he weighted the cases and sorted accordingly.With a digital scale.

[seasprite]

Interesting I have some mixed cases not enough of any particular brand to make a decent load but would like to develop a plinking load with them as long as I could stay within a 1.5" to 2" grouping to hit reactive targets or what ever else I can think of. If you guy's come up with something I'll be watching. <munch>

For serious target ,hunting loads , I weigh (digital scale ) all my brass (by brand ) & I can get quite picky , but the results show it.

You know this is something I haven't done on my OCW thread I've heard of it, knew about it but just forgot to add it to my routine. I already made up my next set of test rounds so I next time I'll weigh some cases and see if that gets me to that .5" mark.

[hollywood]

42.5 gr of xbr 8208. Have not weighed any of the cases and compared between the brands. I suspected that the different brass was the culprit. Just wish I snot them before I went to a local competition. Live and learn.  :)

[survivalshop]

I'm loading target loads for my 24",S/S HB , 1-10 twist, 5.56 chambered AR & below are how I sorted them . I do the same with all my rifle ammo.

5.56 brass

LC -91.8- 92.8 Gr. , 50 ct. so far

LC- 91.0 -91.7 gr. , 20 ct. so far

.223 brass

PMC--93.8

Speer - 93.8 -94.0

RP - 90.3 - 91.6

FC - 92.0 - 93.2

Norinco - 98.0

The different weight groups will be loaded differently , maybe not much ,but the Chrono will tell me where I need to go with each case wt..

I will use the .223 cases for plinking fodder & my wife , oh don't tell her I keep the good stuff for me .

[MikedaddyH]

I sort my brass by manufacturer,trim,prep then weigh in groups for the match ammo. On the plinking ammo I just trim and prep the brass.