7-R or 7-R INT?

[wwinters43]

I am about to reacquire my XP from the mid 80's, which i had rechambered to 7R.
I have been looking around and I see different designations such as 7 international, 7 ihmsa and so forth. are these the same
chambering or what. i am coming back, hopefully in the fall of 2013. thanks

[high standard 40]

7 Int-R is a rimmed cartridge based on the 30-30 case. I doubt any XP100 would be chambered in that. Is it maybe a 7mm Int-X which was a rechamber of a 7BR?..............or maybe it's just a 7BR.

[Alvin]

As I recall.....The XP's were chambered in 7BR. Elgin, promoting his line of 7 International or 7 IHMSA, developed a reamer to convert the XP 7BR to 7 International, BUT there was a problem with cleaning up the chamber....so the 7 Int-X was designed to be used and he had reamers and dies made up for this. Otherwise a shooter had to replace the barrel in the XP and then chamber for the 7Int. I can't remember the exact problem....but you couldn't just use a 7 IHMSA reamer on an 7BR and have it done correctly.

The 7R, or 7 Int. Rimmed, was formed from 30/30 cases....and was chambered in the Wichita Sierra Pistol(and probably other pistols, perhaps the TCs). The Sierra pistol was designed by Bert Stringfellow. Bert later on designed the BF pistol, of course. I still have my Sierra pistol that Elgin gave me back in the mid-80's. The dies are marked 7 INT R. It's a bit of a handfull when fired.

ALvin

[wwinters43]

thanks for all the replies, i do have 10 rounds of match ammo from the time period mentioned. 154 gr sp bullet with 30 grs of 4895 in a reformed 30\30 case, O.A.L 2.850 inches. this is what if used for the whole field and never left a ram standing(unless i missed). the box is marked 7R. guess i'll wait and see when and if i get the gun. should be soon.

thanks

[260 Striker]

Alvin got the XP 7 Int-X 99% correct. When a standard 7 Int reamer is used to rechamber a 7 BR there is just a slight ring left in the chamber where the 7 BR shoulder was. The 7 Int-X reamer is just slightly fatter in that area of the chamber to clean up the old 7 BR shoulder. I have a Wichita in 7 Int and an XP in 7 Int-X and you can't really see the difference between the two cartridges with the naked eye. Both use the same load data and both are very accurate. The 7 Int-R was used in the Wichita break open pistol and TCs. There were many articles in the old IHMSA newspapers and in the Shooting Steel book. The 7 Int-R is the same cartridge as the 7mm Bullberry only with a longer neck. Redding dies for the 7 Int-R can be used to form and load the 7mm Bullberry. I had a TC unlimited gun in 7mm Bullberry and used the Redding dies for reloading. Elgin thought it would be less time consuming forming his cartridge since no trimming was required after running the 30-30 up into the full length die. I have never heard of an XP being chambered for the 7 Int-R but I wouldn't be surprised if someone didn't try to used a rimmed cartridge in an XP. By the way, the 7 Int and 7 Int-X are both great cast bullet cartridges. Maybe the 7 Int-R is too but it didn't really stay popular more than a couple of years with the silhouette crowd.

[WLesbirel]

You may be referring to 7 INT-R This is made from a 30-30 rifle shell, which is rimmed, hence the R. The 7 INT-R is a 30-30 shell necked down to hold a 7mm bullet. The shoulder is modified by the first firing and I trimmed the neck about 1/8th of an inch. It is a fine cartridge, I shot it for many years in a Wichita International with a 10" barrel. Shot lots of INT class scores including 1st place at the Internationals in Ft. Stockton 1992 I think. I also shot this gun in the Super 500 in the standing position in a club outside Richmond VA, Piedmont if I remember correctly. Shot an 11 out of 40 including 5 Rams at 500 meters. Don't think anyone has ever done better.