Great load! ...ended up trying the softer core and thin plated bullets as you suggested, my setup was at 9.3g Unique but last outing instead used a 7.5inch bbl scoped m83 for this session. Most downrange tests were touching or very close and then there was some very good overlapping as well, only a few flyers this session - probably the shooter.
Estimate approx. 1075fps with about 8.3 inches of bullet travel from this gun using the longer bbl, only about 8 lbs or less recoil!! Good 'case' seal in the matching 454 chamber too, which agree is best.
Will work up 454 starline-case 'target' loads for newest shorter gun too. But FIRST will try some hollowbase plated bullets in my 45colt cylinder. Have very high hopes for this project as well, especially for accuracy. Could be ideal bore seal at low velocity which I am hoping will help a great deal, for consistent tight groups?
On my particulars, as for why I went ahead and got the extra 45 Colt cylinder on above gun, this go around....
Besides really enjoying testing for just about any 45 calber 'accurate' loads which is my usual priority during off-season ~ tho like other calibers alot too .... yet during the long 3-4 month hunting season have much less time to put together target loads when handloading. The 'factory' 45Colt ammo becomes a really nice option, when needed.
So my experience has been that light recoiling 'factory' 45 colt ammo has been consistently very accurate in a matching Colt chamber rather than in the longer 454 chamber yet can still use same gun when hunting with 454 loads, just swap the cylinders which is still convenient.
These lighter rounds normally shoot at a different POI but am just shooting for tight groups ~ where my actual zero is for the 454 hunting loads, that is, for during the season anyway.
For hunting, I usually like 'heavier bullet' handloads at lower velocity or sometimes Hornady 454 300g xtpmag 'factory'(as needed, perhaps for big bear areas and really for elk hunting too ~ however, those high velocity Hornady factory rounds are not 'heavy use' target rounds, for me anyway, yet enjoy shooting those too).
Happy shooting! Squint
Last edited by squint; 05-21-2020 at 03:26 PM.