PRODUCT FOCUS COMPARISONS Case measurements of Hornady and Starline .38 Super Comp cases. A Remington semi-rimmed case was included for comparison. All dimensions in inches. Length Rim Exactor Groove Body Weight of A#5 Hornady .38 Super Comp 0.895 0.387 0.330 0.381 18.1-grains Starline.38 Super Comp 0.896 0.386 0.329 0.380 17.9-grains Remington .38 Super 0.900 0.400 0.340 0.381 18.4-grains SAAMI .38 Super Maximum 0.900 0.406 0.345 0.384 CASE WALL THICKNESS AT VARIOUS DEPTHS WILL DETERMINE WHAT WEIGHT/ LENGTH OF BULLETS CAN BE USED WITHOUT EXCESSIVE BULGING This is not Hornady's first rimless .38 Super case. They used to manufacture the rimless .38 TJ (Todd Jarrett) cases which also had a special extractor groove geometry. Hornady does not make the .38 TJ cases at present, though Starline does. The .38 Super Comp has been around a while and is produced by Starline. The Starline Super Comp case is not truly rimless, and sports a mini-rim. The rim measures 0.386-inch while the case body is 0.380-inch. It's small, but it's there. Hornady has duplicated this mini-rim in their design. The extractor groove geometry of the Hornady Super Comp and Starline cases look the same. Case capacity of the new Hornady case was measured and compared to Starline cases. I used the fine grained Accurate #5 powder for this comparison. It has a bulk density of 0.990 grams per cubic centimeter, which is nearly the same as water (water = 1.0 gram / cc). The Hornady case has slightly more capacity than the Starline, holding 0.2-grains more powder. 20 AUGUST 2017 | SSUSA.ORG Case wall thickness at various depths will determine what weight/ length of bullets can be used without excessive bulging that would prevent the round from fitting in the chamber. The Hornady brass will accept heavy bullets at nominal overall lengths. I was able to seat 160-grain cast round nose bullets to 1.265-inch and a 170-grain Sierra FMJ .357 bullet to 1.280-inch without excess bulging of the case wall. I did see a measurable bulge when seating a 180-grain Nosler .357 JFP bullet at 1.245-inch. It still fit in my chamber, but it had a 0.002-inch bulge at the base of the bullet. The rimless .38 Super Comp is a distinct improvement over the semi-rimmed design, and Hornady's high quality cases will be welcomed by .38 Super shooters everywhere. The suggested retail price is $80.35 per 200. A quick Google search located the new Hornady brass at MidwayUSA, Grafs, and Midsouth Shooters at discounted prices.https://www.midwayusa.com/product/674207/hornady-reloading-brass-38-super-competition-box-of-200 https://www.grafs.com/retail/catalog/product/productId/73920 https://www.midsouthshooterssupply.com/item/000038734/38-super-comp-unprimed-pistol-brass-200-count http://www.SSUSA.ORG