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Rifles, Reloading, Optics, Equipment
Reloading
190gn and up in .300win mag?
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<blockquote data-quote="specweldtom" data-source="post: 316654" data-attributes="member: 2580"><p>Man, you're off to a running start. The 220's are great bullets, I'm just surprised at the velocities you're reaching. My experience was that the 190's were about optimum for the .300 Win., with the right balance of B/C, velocity and trajectory. However, in my rifle, the 200 grain full patch bullets did have a slight accuracy edge at 600 yds and beyond, so I used them in competition, but hunted with the 190's. I don't remember why I didn't stick with the 220's, but it was probably velocity. Best I can recall, they only went about 2500 with safe loads of IMR 4350. I did try them recently in a .30 x .378, with fair results. </p><p></p><p>I also dope elevation much better than I can dope wind.</p><p></p><p>Your group sizes are real confidence builders, and you're right about the wind bucking qualities of the 220's. I agree wth you on sticking with them at this point. Tuning your loads to absolute optimum is a great way to spend some time just getting real comfortable with your rifle/load combination. Try some sitting shots too. You may not always be able to get prone if tall grass or terrain interferes. </p><p></p><p>I'm guessing it'll be much colder in Kyrgyrzstan than where you are now. Get your final zero in Italy at as low a temperature as possible. A drop in temperature of more than 10 deg F from your zeroing temp will probably drop the impact point measurably at 300 meters and get worse at longer ranges. We used to dope 1 moa bullet drop for every 10 deg F drop from zeroing temperature (with 4895 in .308 Win). I don't know how the VV powders handle temp changes. Something else to consider is a change in geographic elevation. The rifle will shoot flatter at higher altitudes. If at all possible, check your zero and trajectory when you get to your hunting area. Nothing like knowing for sure. Barring that, do the ballistics tables at different lower temperatures and higher elevations and take the data with you. It's the next best thing to actually firing under the prevailing conditions, and just doing the homework is itself a confidence builder. </p><p></p><p>Remember to clean any grease out of the inside of your bolt, and only use a very light oil sparingly on any moving parts. I would also wash out my trigger with a spray brake cleaner solvent and blow it dry with compressed air. It won't hurt it to be oil-free for a few shots, and you can relubricate it when you get back. It may change the feel of the trigger, but it won't get "muddy" or seize up when you need it.</p><p></p><p>I apologize for getting so long winded and preachy, but old guys apparently can't help it.</p><p></p><p>I hope you have a great hunt, and would really enjoy hearing about it when you get back. </p><p></p><p>Good luck and good hunting, Tom</p></blockquote><p></p>
[QUOTE="specweldtom, post: 316654, member: 2580"] Man, you're off to a running start. The 220's are great bullets, I'm just surprised at the velocities you're reaching. My experience was that the 190's were about optimum for the .300 Win., with the right balance of B/C, velocity and trajectory. However, in my rifle, the 200 grain full patch bullets did have a slight accuracy edge at 600 yds and beyond, so I used them in competition, but hunted with the 190's. I don't remember why I didn't stick with the 220's, but it was probably velocity. Best I can recall, they only went about 2500 with safe loads of IMR 4350. I did try them recently in a .30 x .378, with fair results. I also dope elevation much better than I can dope wind. Your group sizes are real confidence builders, and you're right about the wind bucking qualities of the 220's. I agree wth you on sticking with them at this point. Tuning your loads to absolute optimum is a great way to spend some time just getting real comfortable with your rifle/load combination. Try some sitting shots too. You may not always be able to get prone if tall grass or terrain interferes. I'm guessing it'll be much colder in Kyrgyrzstan than where you are now. Get your final zero in Italy at as low a temperature as possible. A drop in temperature of more than 10 deg F from your zeroing temp will probably drop the impact point measurably at 300 meters and get worse at longer ranges. We used to dope 1 moa bullet drop for every 10 deg F drop from zeroing temperature (with 4895 in .308 Win). I don't know how the VV powders handle temp changes. Something else to consider is a change in geographic elevation. The rifle will shoot flatter at higher altitudes. If at all possible, check your zero and trajectory when you get to your hunting area. Nothing like knowing for sure. Barring that, do the ballistics tables at different lower temperatures and higher elevations and take the data with you. It's the next best thing to actually firing under the prevailing conditions, and just doing the homework is itself a confidence builder. Remember to clean any grease out of the inside of your bolt, and only use a very light oil sparingly on any moving parts. I would also wash out my trigger with a spray brake cleaner solvent and blow it dry with compressed air. It won't hurt it to be oil-free for a few shots, and you can relubricate it when you get back. It may change the feel of the trigger, but it won't get "muddy" or seize up when you need it. I apologize for getting so long winded and preachy, but old guys apparently can't help it. I hope you have a great hunt, and would really enjoy hearing about it when you get back. Good luck and good hunting, Tom [/QUOTE]
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190gn and up in .300win mag?
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