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lastmanout
02-12-2007, 12:27 AM
Today I lucked into 2000 Hornady 6MM gas checks at my local gunshop. Never cast bullets that small , but I do have a 243 Winchester. Looking online, I see no new 6MM gaschecks listed by Hornady and NO lyman gaschecks whatsoever. So if I did buy a 243 mold, it is only good for 2000 bullets. Could I expect fair to good accuracy from 6mm cast Boolits? (at mild velocities) Is there a future source for 6MM gaschecks? I welcome your opinions and advice.

Bullshop
02-12-2007, 12:32 AM
Sell em to me.
BIC/BS

carpetman
02-12-2007, 12:58 AM
lastmanout---I use the 95 grain RCBS mold which is a gas check variety and they shoot great in my .243. I think I have shot them without gas checks too---I know for fact I have shot the .22 cals sans gas check and it is similar shape. I have shot them as fast as 2900 fps.

1Shirt
02-12-2007, 11:53 AM
I have a Lyman 85 gr. Lovern style and a 95 gr Lyman FN both gas checks. The 85 grainer shoots well out of most any 243 at vol. in the 1800-2100 range. The 95 grainer however is a bit long mor most 243's, unless they have a faster twist than the average 243.
1Shirt!:coffee:

felix
02-12-2007, 11:58 AM
1Shirt, something is wrong somewhere. 10 twist is the defacto standard for the 243 winnie cartridge. Enough twist it seems, especially if the boolit is not a full wadcutter at 95-100 grains. ... felix

TDB9901
02-12-2007, 12:26 PM
If I remember my history correctly, that's why the .243 outsold the old .244 Remington.......The ability to handle the longer 100 -105 grain bullets. That was the reason Remington discontinued the .244, and reintroduced the same cartridge as the 6mm with a faster twist to compete.

Maven
02-12-2007, 12:29 PM
lastmanout, I have a .243Win. and the Ly. Loverin mold which you mentioned. Accuracy is quite good up to ~1,800fps. I have also owned and sold a 95gr. Lyman and 95gr. RCBS mold because accuracy was erratic. PM me if you want more info.

dakotashooter2
02-12-2007, 12:37 PM
Looking online, I see no new 6MM gaschecks listed by Hornady and NO lyman gaschecks whatsoever.

You must be looking in the wrong places. I see them on ebay all the time. And midway has them listed.

carpetman
02-12-2007, 03:31 PM
1shirt--The material for a jacket on a jacketed bullet is lighter than lead. Thus a jacketed bullet to be the weight of a cast bullet would need be longer to make up the difference. In the case of a .243 a .95 grain cast is about .3" shorter than a 100 grain jacketed. The 100 grain jacketed is not at all too long. TDB9901,both the .243 Win and the .244 Rem came out in 1955 and the folks at Rem thought it would be a varmint round and the twist they used would not statbilize the heavier bullets. They did not correct this until 1963(gave the .243 an 8 year head start in effect) I think if they had done it correctly in 1955 the .243 would not have nearly the popularity of the .244/6mm Rem. (had it been done correctly in 1955 there would be no 6MMRem-just the .244).

arkypete
02-12-2007, 09:09 PM
Lastmanout
I used the RCBS, Saeco and NEI 243 bullets.
Never got bench rest accuracy, but was well pleased.
It's my opinion that the smaller the bullet the closer to perfection and attention to detail the caster must be.
I would cast all three bullets using one 20 pound pot of alloy. When that pot was empty that was considered one batch. The next batch of alloy would shoot minutely different. Didn't require any change other then aiming point or scope setting.
I used RL-7 powder, WW primers and a mixed bag of brass separated by manufacturer.
Jim

lastmanout
02-12-2007, 11:27 PM
lastmanout, I have a .243Win. and the Ly. Loverin mold which you mentioned. Accuracy is quite good up to ~1,800fps. I have also owned and sold a 95gr. Lyman and 95gr. RCBS mold because accuracy was erratic. PM me if you want more info.

Thanks for the offer, Maven!

lastmanout
02-12-2007, 11:31 PM
I see them on ebay all the time. And midway has them listed.[/QUOTE]
Hi Dakota, I forgot to check Midway, Looks like Lyman still makes gas checks (they work OK but I was never too fond of them). I will continue to live without Evil-Bay:twisted: They burned me with customer 'no-service' for the last time.:(

lastmanout
02-12-2007, 11:37 PM
Lastmanout
I used the RCBS, Saeco and NEI 243 bullets.
Never got bench rest accuracy, but was well pleased.
It's my opinion that the smaller the bullet the closer to perfection and attention to detail the caster must be.
IJim

Thanks Jim, That is the opinion I read in the old Lyman and NRA books and it looks like you proved them right. Guess I stick with the larger Boolits.

arkypete
02-13-2007, 07:21 AM
Thanks Jim, That is the opinion I read in the old Lyman and NRA books and it looks like you proved them right. Guess I stick with the larger Boolits.

Lastmanout
The reason I quit tinkering with the 243, well two reasons, one I gave the rifle to my son-in-law and I got a 375 Whelen set up for cast boolets. I kept all of the gear, molds, dies, gas checks, and notes so that I can go back to tinkering.
I think the caliber is capable of one hole, five shot, 100 yards groups using nearly condum bullet velocities.
It would seem that I'm easily distracted. I side tracted to the 45 Colt on a lever, 405 in a lever, 45-70 in a lever, 30-06 in a lever, there's an 8mm in the safe waiting for me to come play, the 375 Whelen looks sad because........
Give the 243 a run and I can use you info.

Jim