What was the first brass you converted

[Electric88]

223 to 300 blackout. I started simple

[jrap]

8mm mauser from 30-06. probably the simplest conversion out there. Just run it through an 8mm sizer and trim

[james23]

35 remington to 6.5 Japanese

[kutil]

9x19 - 7,65 MAS
9x19 - 8 Roth Steyr 07
38 Special - 9x19 Blanc
38 Special - 8 Rast Gasser
7x64 - 8x57 Blanc
308 - 8x33
308 - 8x33 Blanc

[kjorgy]

My first was 45-70 t0 38-56 3 steps
1. Anneal case
2. Resize in 40-65 die
3. Resize in 38-56
4. Trim to correct length 2.10" case length

[dryflash3]

308 to 300 Savage, learned about neck thickness from that.

30-30 to 7-30 Waters.
223 to 300 blk.

[cliff55]

6.5x57 to 9.3x57
would have been easy if I could have found some 8x57.

[jrap]

I also tried 6.5 jap from 35 rem but it collapsed into itself

[Steve E]

My first was 444 Marlin to 309 JDJ.

Steve........

[AllanD]

The first ones I ever did were converting military 30-06 cases own to 25-06, before I discovered that 270 case made it all easier...

Later on my brother bought a rem700 varmint rifle in 6mm Rem which came with an RCBS case conversion die set
and a bag of 7x57 brass

I stubbornly worked through all that brass t have them all split necks or shoulders when fired... then said something unorintable
and bought virgin 6mm rem brass...

Loaded up all that 6mm brass with 75grain HP varmint bullets only to discover that when seated out 0.010" short of the rifling that they were 1/4" too long to fit in the magazine...

I still plan on owning a rem varminter in 6mm but I'm building the damned thing on a long action....

[Chris24]

I think it was .40S&W to 357 Sig. I know it's not recommended, but I had some boxer primed steel cases and did it on a whim. It worked, and I probably had the only steel cased 357 Sig in existence! They worked well.

Now I just use once fired 357 Sig brass. Since then, I've reformed .223 to .300 AAC, among others.

[NavyVet1959]

I think it was .40S&W to 357 Sig. I know it's not recommended, but I had some boxer primed steel cases and did it on a whim. It worked, and I probably had the only steel cased 357 Sig in existence! They worked well.

Now I just use once fired 357 Sig brass. Since then, I've reformed .223 to .300 AAC, among others.

I've reformed steel .223 to .300 AAC before, just to see if it could be done.

[Ohio3Wheels]

First was 30/06 to 6.5mmx06, I too learned it was easier with 270 or neck expand 25/06
then came 30/30 to 357 Herret, then 223 to both 7mmTCU and 6.5mmTCU and lastly so far 45-70 to 40-65, but I buy Starline 40-65 cases when I can.

Make smoke,
Curt

[357Wheelgunner]

My first was 221 Fireball cases to .17 cal. Mark V for a custom 14" Contender barrel. Made the sizing dies and a outside neck turner myself in the machine shop in college, bet you could not do that today with the teachers blessing! That was back in the early '70s and 17 cal was just starting up. A real hoot to shoot.

[Grapeshot]

The first cartridges I converted were .45 Colt to .45 Schofield for my new Schofield revolver. The next conversion was .45-70 Government to .45-60 WCF. Lately it has been 9mm Luger to 9mm Makarov and .303 British to .30-40 Krag.

[crashguy]

30-06 / .270 win to 8mm

[NavyVet1959]

Just acquired an old Arisaka Type 99 that had been sporterized, so it looks like I'm going to be converting some .30-06 to 7.7x58...

[obssd1958]

NavyVet1959,
Do a chamber cast first...
I bought a type99 that had a beautiful sporter stock on it, and I was excited to get it shooting, but had been told that it was possible that it had been converted over to a .30-06 - sort of. I did my first chamber cast on that rifle, and found that a previous owner had run a .30-06 reamer into the chamber. So now I had a .30-06 with a 7.7 bore.
No problem!! I cast my own boolits. I'll just cast 'em large enough for the bore, load 'em in '06 cases, and have a blast!!
Would have worked fine, but after all that work, when I went to the range, nothing happened when I pulled the trigger. I would get a "click", but no "bang"...
Turns out that the firing pin was broke off half an inch back. Before I could replace the bolt assembly (cost as much for the whole assembly as it did for just the firing pin), a friend offered me as much as I had paid for the whole rifle, for just the stock - I sold him the whole thing.

[mtnman31]

Not sure, I think my first conversion was 41 swiss from 8mm Lebel.

[NavyVet1959]

NavyVet1959,
Do a chamber cast first...
I bought a type99 that had a beautiful sporter stock on it, and I was excited to get it shooting, but had been told that it was possible that it had been converted over to a .30-06 - sort of. I did my first chamber cast on that rifle, and found that a previous owner had run a .30-06 reamer into the chamber. So now I had a .30-06 with a 7.7 bore.
No problem!! I cast my own boolits. I'll just cast 'em large enough for the bore, load 'em in '06 cases, and have a blast!!
Would have worked fine, but after all that work, when I went to the range, nothing happened when I pulled the trigger. I would get a "click", but no "bang"...
Turns out that the firing pin was broke off half an inch back. Before I could replace the bolt assembly (cost as much for the whole assembly as it did for just the firing pin), a friend offered me as much as I had paid for the whole rifle, for just the stock - I sold him the whole thing.

I had read that it was physically possible to chamber a 7.62x51 in a rifle chambered for .30-06 AND it will even fire as long as the rifle holds the 'rim' securely, so I was curious what would happen if I tried to chamber one in the Arisaka. Apparently the Arisaka's chamber is slightly smaller in diameter since even though it looks like it chambers, the bolt cannot be rotated to lock. So, that leads me to believe that it is still chambered in 7.7x58.