Want to tinker with 45x357?

[GM54-120]

Well here is your bullet and its made for rifle speeds too. Get a pack of 45x357 PR sabots and go to town. 355cal fits those sabots better than 357 and way better than 358.

https://www.midwayusa.com/product/1021832351?pid=272356
https://www.hornady.com/bullets/rifle/35-cal-.355-165-gr-ftx#!/

https://www.midwayusa.com/product/1021205725
https://www.hornady.com/bullets/rifle/35-cal-.355-170-gr-sp#!/

 

[GM54-120]

They still got some of the 170s and 180s cheap. Who is gunna be the guinea pig?
https://www.midwayusa.com/product/1021525515?pid=524902

And the sabot you would need. The MMP blue is kinda short. These are longer.
https://www.prbullet.com/shop/products_view.php?sSKU=0500