Compressing Swiss 1.5

[Opencountry]

I traded a can of Swiss 1.5 (an older lot) for a can of my Goex Fg so that my friend and I could sample one another's powder. I wanted to try the Swiss in my 45-70, and he the Goex Fg in his 45 2 7/8". I found that his Swiss 1.5 powder was very dense weightwise per volume, and 63 grains needed very little compression to achieve target accuracy. I was sold on the Swiss! I ordered a case last month for my 45-70 and my future 45-90. I've been working my way from about .070" compression (60 grains) up to around .20" compression (65 grains) so far. I'm still hunting for that target accuracy load, and will need to try 66,67,68, or more grains. Compression will be going up to and beyond .30" when I get up to 68 grains. The new lot is less dense and requires more compression. The lot number is 030.111. From what I have read on another forum it's not uncommon to have to compress quite a bit to find good accuracy. I guess I was just plain lucky with his can of older powder. Anyone else have the same experience with the newer lots of Swiss 1.5?

Robert

[Brownie Nash]

There are some that say Swiss does not like compression. I have found the opposite. On several rifles I use .150 to .250 with excellent results.

Brownie

[Old Jim]

I am compressing 1.5 Sw. @ 0.275" with 68.0 gr. in the 45/70 to get the bullet to touch the riflin' a smidgent or so .

Jim

[Dave Roelle]

The best load i have for my 45-70 with the BACO money bullet is 74 grains Swiss 1.5----------bullet seated to engrave the riflling about 0.003

Ran a load test from 60 to 74 grains -----------only difference being compression due to powder charge column height increasing-----------drop tubed 24 inches and compressed---------accuracy contunued to improved with increasing charge weight.

This yeilds a 1.5 minute of accuracy load out to 800 meters when i mash the trigger right

Dave

[Brownie Nash]

Dave

With 74 gr. what kind of compression are you using to seat the money bullet to engrave rifling's????

Regards

Brownie

[Dave Roelle]

Hi Brownie:

I'll check my load data on the shop computer and let ya know tomorrow

Dave

[Dave Roelle]

Hi Brownie:

I had some time and checked my load data this morning--------------0.380 inches nominal

Have a great day

Dave

[Brownie Nash]

Dave

Thanks for the reply. My maximum so far is .250 and I was wondering if I was close to the point of more compression and I might lose accuracy. From your reply I can compress some more before it might be to much.

Regards

Brownie

[Lumpy Grits]

Hi Brownie:

I had some time and checked my load data this morning--------------0.380 inches nominal

Have a great day

Dave

Dave, do you know the MV of that 74gn load? What bullet??
THX,
Gary

[Dave Roelle]

In All honesty Gary i haven't chronographed the load------------several computer balistics calculaters show right at 1300----------i betcha its between 1250 and 1300

The bullet is the BACO money bullet------15/1 about 512 grains 0.459 diameter----no taper

so far its been the most consistent performer in my Shiloh----

Been working with a lyman postell and am considering trying a creedmore style around 500 grains i have mixed results with the Postel for some reason i have yet to nail down

hope to work into paper patch soon

Dave