nkyshooter
Well-Known Member
My 30 Sherman Magnum barrel is ordered and I hope to have it in about a month!!! I'm building this to achieve a personal goal of a 1 mile hit on a 5 gallon bucket as well as doubling as a long range hunting rifle if/when I ever get the opportunity to use it on a long range larger game hunt.
It's going to be a 26" X-Caliber 5R 8 twist minimally headspaced on a Savage 110 with Accutrigger and a 20 MOA rail in an HS Precision stock with the Lapua 338 bottom metal allowing me to utilize the 3.850" 300 winmag/300 PRC magazines ... oh - and an ever important Ross Schuler 4 port brake.
I'll be working up one load for 300 PRC during fire forming / break in / rifle setup and then building up a long range target load for a 1 mile load post fire forming.
I'm needing/looking for feedback from those of you who have been loading for the 30 Sherman Magnum - OR - have Quickload on using the below initial/starting loads ... I'm using the below components primarily because it is what I have and coming up with other is not trivial right now ...
FYI - currently planning to use 1x fired Hornady PRC brass for this ... and my understanding is that the formed brass should have around a 98gr capacity.
Fireforming/Break In (H4831/Hornady 178gr Match and/or 178gr ELD-X ... unless someone has some 212 ELD-X they can spare
):
- use the 300 PRC load data from Hornady
- 76 gr of H4831 starting - work up 1gr increments to find ceiling then ladder to accuracy node
Long range target load (H1000/Hornady 230gr A-Tip) post fireforming:
- use the 300 PRC load data from Hornady and start in upper half of the window as low end of window working up from there
- 74 gr of H1000 starting - work up in 1 gr increments to find ceiling then ladder to accuracy node
All the above will be using Federal 215 match primers since that is what I have.
Data I've used to come to the above conclusions include:
300 PRC load data from Hornady shows:
300 PRC load data from Hodgdon.com shows:
30 Nosler load data from Nosler.com shows:
I'm hoping to get to an very accurate load (sub .5 moa) with the 230s at 2900-3000 fps or better for appox 1350 fps on a 1 mile target ... however, ballistics calculations indicate 2600fps at the muzzle with the 230gr A-Tip will keep me supersonic all the way there and I should be WELL above that even without the elusive RL26 or N570 powders.
Any input on starting loads and/or concerns with my approach as outline above would be most appreciated!
Thanks in advance ...
Tim
It's going to be a 26" X-Caliber 5R 8 twist minimally headspaced on a Savage 110 with Accutrigger and a 20 MOA rail in an HS Precision stock with the Lapua 338 bottom metal allowing me to utilize the 3.850" 300 winmag/300 PRC magazines ... oh - and an ever important Ross Schuler 4 port brake.
I'll be working up one load for 300 PRC during fire forming / break in / rifle setup and then building up a long range target load for a 1 mile load post fire forming.
I'm needing/looking for feedback from those of you who have been loading for the 30 Sherman Magnum - OR - have Quickload on using the below initial/starting loads ... I'm using the below components primarily because it is what I have and coming up with other is not trivial right now ...
FYI - currently planning to use 1x fired Hornady PRC brass for this ... and my understanding is that the formed brass should have around a 98gr capacity.
Fireforming/Break In (H4831/Hornady 178gr Match and/or 178gr ELD-X ... unless someone has some 212 ELD-X they can spare
):- use the 300 PRC load data from Hornady
- 76 gr of H4831 starting - work up 1gr increments to find ceiling then ladder to accuracy node
Long range target load (H1000/Hornady 230gr A-Tip) post fireforming:
- use the 300 PRC load data from Hornady and start in upper half of the window as low end of window working up from there
- 74 gr of H1000 starting - work up in 1 gr increments to find ceiling then ladder to accuracy node
All the above will be using Federal 215 match primers since that is what I have.
Data I've used to come to the above conclusions include:
300 PRC load data from Hornady shows:
- 178gr bullet with H4831 69.1-82.5 grains
- 230gr bullet with H1000 66.9-77.5 grains
300 PRC load data from Hodgdon.com shows:
- 175gr bullet with H4831 71.5-77.3 grains
- 230gr bullet with H1000 70.4-75.7 grains
30 Nosler load data from Nosler.com shows:
- 175gr bullet with H4831 75.0-79.0 grains
- 220gr bullet with H1000 73.5-77.5 grains
I'm hoping to get to an very accurate load (sub .5 moa) with the 230s at 2900-3000 fps or better for appox 1350 fps on a 1 mile target ... however, ballistics calculations indicate 2600fps at the muzzle with the 230gr A-Tip will keep me supersonic all the way there and I should be WELL above that even without the elusive RL26 or N570 powders.
Any input on starting loads and/or concerns with my approach as outline above would be most appreciated!
Thanks in advance ...
Tim
