Load data to simulate Core-lokt 350 Rem mags

[sheepdog]

I know that's pretty specific but wanting to make a bunch of practice rounds for a Remington 600 short action in 350 rem mag that can be used as a cost saver duplicate for my buddy's rifle. He hunts with 350s but cant afford to practice with it due to price.

[felix]

That 600 is a 16 twister! 250 grainers would be absolute max unless the gun has a "perfect" barrel. ... felix

[sheepdog]

I have a nice stash of nice flat nose .35 boolits a member sent me that weight in at 206 lubed and gas checked.

[helice]

Sheepdog,
Your friend has a wonderful weapon and I encourage him to practice with it. The 350 will not let him down.
For a 206 gr cast GC Lyman recommended Unique 14gr=1522'/s and Max 18gr=1760'/s. They gave no pressure #s. IMR 4227 29gr=1776 and max 33gr=2004. IMR4198 39gr=2032 and Max 42=2164. IMR3031 41gr=1805 and Max 50gr=2298'/s.
IMR showed 4227 at 38.5 grains (MAX) got 2420 foot seconds. I assume that was with Jacketed. With a 180 Cast LBT FN-GC 29 gr. produced 1921'/s in my 600. 38grains of ReLoder 7 drew very close to 2000'/s.

I have used 17gr Unique behind a plain based LBT WLN 240gr that drew 1552'/s and amazing accuracy. This is a MAX load according to Lyman. This load gets close to the old 35 Winchester and the 38-55. I am told by older wiser men that they are quite capable of harvesting deer sized animals with ease.
13 grains of RED DOT behind that 240 got close to 1400'/s with excellent accuracy. That is 44 Mag pistole' weight and velocity. Again capable of dropping deer. I consider this a Max load for me. (Thank You C.E. Harris.)

With cast bullets I don't recommend striving for jacketed velocities. I think its a waste of powder and it typically produces disappointing accuracy. Again, this attitude is thanks to C.E. Harris, a most reputable contributer. The above loads are much more fun. My 600 at full bore with the 250 gr. round nose will talk me out of practicing fairly quickly. These lighter loads will let me practice the repeat shot over and over with no pain.

I have a lot more load data on the 350 RM in the 600 but I suggest you try these light loads first. When you run out of 206 grain GC slugs use any 357 round nosed, plain based pistole' bullet you have. When you keep velocity down you don't need the gas check. If you want more, email me. I have no secrets and I keep no secrets. What's mine is yours and I hope it helps. :-) Helice

[NickSS]

I had a 660 carbine in 350 Rem mag a long time ago and shoot mostly full house Jacketed bullets in it but I did try some 200 gr plain base bullets in it for practice (the full house loads were not pleasant to shoot from a bench) I believe I used 15 gr of Unique and it was a nice mild practice load.

[sheepdog]

Sheepdog,
Your friend has a wonderful weapon and I encourage him to practice with it. The 350 will not let him down.
For a 206 gr cast GC Lyman recommended Unique 14gr=1522'/s and Max 18gr=1760'/s. They gave no pressure #s. IMR 4227 29gr=1776 and max 33gr=2004. IMR4198 39gr=2032 and Max 42=2164. IMR3031 41gr=1805 and Max 50gr=2298'/s.
IMR showed 4227 at 38.5 grains (MAX) got 2420 foot seconds. I assume that was with Jacketed. With a 180 Cast LBT FN-GC 29 gr. produced 1921'/s in my 600. 38grains of ReLoder 7 drew very close to 2000'/s.

I have used 17gr Unique behind a plain based LBT WLN 240gr that drew 1552'/s and amazing accuracy. This is a MAX load according to Lyman. This load gets close to the old 35 Winchester and the 38-55. I am told by older wiser men that they are quite capable of harvesting deer sized animals with ease.
13 grains of RED DOT behind that 240 got close to 1400'/s with excellent accuracy. That is 44 Mag pistole' weight and velocity. Again capable of dropping deer. I consider this a Max load for me. (Thank You C.E. Harris.)

With cast bullets I don't recommend striving for jacketed velocities. I think its a waste of powder and it typically produces disappointing accuracy. Again, this attitude is thanks to C.E. Harris, a most reputable contributer. The above loads are much more fun. My 600 at full bore with the 250 gr. round nose will talk me out of practicing fairly quickly. These lighter loads will let me practice the repeat shot over and over with no pain.

I have a lot more load data on the 350 RM in the 600 but I suggest you try these light loads first. When you run out of 206 grain GC slugs use any 357 round nosed, plain based pistole' bullet you have. When you keep velocity down you don't need the gas check. If you want more, email me. I have no secrets and I keep no secrets. What's mine is yours and I hope it helps. :-) Helice

If we're going going to shoot for jacketed velocities I at least need a load thats same point of aim at 100 yards scoped. Hes able to cloverleft with core-lokt ammo right now, dont want to make him adjust his scope for practice.

[helice]

He might want to get a taller target and just check his groups. I assume that he has a good scope. A man with sense enough to acquire a 350 Rem Mag has to know something about his guns. Good scopes don't mind being adjusted. When hunting season rolls around fire 5 jacketed to re-zero. Then go harvest some venison.

[helice]

Been wondering? What grain weight CorLoct? 200?? 250?? What is his zero range? Does he know his velocity? If so what velocity? If he's reloading what is his load? If he's zeroed at 225 yds or so I might be able to develop a load that is lower velocity but gets close to zero at 100yds. If that would help? This way he could practice at 100 yards without messing with his scope. We are working with one of my favorite rifles here and it would be fun for me to experiment. :mrgreen: I can't get spot on cause I don't have a 200 grain cast bullet but I think I could get close.

[sheepdog]

Core-lokt is only made in 200 grains. I know he doesnt want to adjust his scope for a fact .

[35remington]

Getting a 200 grain load at lower velocity to hit the exact same point of aim as a 250 at 2500 is unlikely (there's just too much difference in bullet weight and velocity) but I have a way around that which works just fine, and you don't need to rezero the rifle. Lighter bullets weights at lower velocity hit unavoidably low, but a scoped rifle's got that covered the way I do it.

To duplicate the 35 Remington, I like 33 grains SR 4759 in my stainless Ruger Mk. II 350 with a 22 inch barrel with a 200 grain jacketed roundnose. I was going to be darned if I was going to be using more powder than the 35 Remington uses to get the same velocity, so I went with the somewhat faster burning SR 4759 which may be the most famous and one of the very best reduced load powders of all time.

This 33 grains gave a chronoed average of right around 2200 fps, which was my target velocity, and shot very good groups (the 35 Remington uses about 34 grains Reloder 7 to get the same velocity, so I'm right in the ballpark with the load economy bit......my aim exactly). By zeroing the rifle with 250's, then adjusting a variable power scope in magnification, you may have the lighter load hitting on the junction of the thick/thin part of the duplex reticle; you then memorize the power setting that produced this point of impact convergence. This lower aiming point is then used for the light load without the need to rezero the rifle.

The 200 Core-Lokt is the best of the handloading component 200 RN's in terms of terminal performance, and the 33SR4759/200 Core-Lokt load would be a wonderful deer load to 200 yards or a bit more, covering almost all hunting opportunities.

If you use this with a cast bullet, reduce the load about three grains and give it a go.

[helice]

Sheepdog,
appologies to you for not getting you what you're looking for. I said before that I don't have a 200 gr mould but here are some loads I've done.
225 LBT FN-GC 46gr Re-7 = 2266'/s
190 Ranch Dog 45gr Re-7 = 2322'/s
180 LBT FN-GC 42 gr Re-7 =2310'/s
180 LBT FN-GC 30gr I-4227 = 2036'/s

These probably won't go fast enough for you but you can give one a try with maybe 5 rounds and see where they're printing at 100 yards. Helice