Ok very newbie here to this caliber, which gets the nod from the more experienced here ?

And why ?

Thanks

I use Starline in my .45-90's and don't have any reason to try anything else. 

Chris.

grumpy,
are you shooting this in a bpcr with black powder?
if you are, here are some thoughts.
best accuracy comes from a bullet who's diameter as cast that will slide into an unsized fireformed case.
as we know, the bullet will bump up to what ever diameter is available to it before it starts to move.
using the above mentioned diameter, this bumping up will be minimized.
we also know that optimum bullet diameter is 0.001" max over groove diameter.
if the chamber dimension allows the obturated i.d. of the case to be bigger than 0.001" over groove diameter, potential accuracy is challenged.
we cannot make the chamber smaller, so the wat to reduce the i.d. of the obturated case is to use thicker brass necks.
norma basic brass (used for the 2 7/8" case) has slightly thicker brass at 2.4" than starline, and norma 3 1/4" brass is thicker again at 2.4", offering options for perfact bullet fit.
trimming longer brass to length also offers the opportunity to get a case length absolutely fully up to the chamber/barrel transition, also good for accuracy and leading minimization.
establishing all these things takes time, effort, and thought, but rewards can be worthwhile.
i am not trying to denigrate starline, as it is good brass when annealed correctly. just offer alternatives for different situations.
all the above is null and void if the chamber is an original pp chamber for bore diameter bullets, but the concept is the same.
incidentally, your description of the chambering as 45/90 can muddy the waters.
45?90 was a winchester chambering for lever and single shot rifles with slow twists for light bullet express loadings.
the sharps case that this was based on is more correctly referred to as the 45/2.4".
modern ignorance on these issues has led to mislabelling to suit marketing purposes.
keep safe,
bruce.

Have no comment on Jamison as I've never used and do not know anyone who does. However, Starline provides a quality product and does an excellent job of supporting our matches with donations of brass for prizes at the drawings, etc. While Jamison may as well, I've never attended a match where Jamison brass was a prize (and I attend several regional/nat'l matches most seasons).

Not much to decide now. On the Shiloh site a poster living near Jamison reports they have shut down.Website shows no items in stock but a fire sale on Gunbroker by a wholesaler.
Latest story is to reorganize the company.

marlinguy, They did, go to the Captec-Jamison web site and all pages of products are listed as "out of stock"
As I said above go to Gunbroker and search Jamison brass the dealer selling vast amounts must have bought the whole warehouse full.