It'll work if you can find a really blunt bullet that will meet the COL limits of the magazine you're using. Some 358 bullets will leave the case mouth over the ogive even when loaded as long as what will feed through a magazine with a 1.71" case length. Making the case 1.8" will just magnify the issue unless you also increase the maximum COL somehow. Now for the 444 x 1.8", that will feed in an ar15 based off of 30-06 type cases using sp and hp bullets. FTX bullets are too long unless you remove the red tip. Use a 22-250 bolt and extension and you can match 444 velocities with 225gr-265gr bullets.