Welcome to High Performance International Simply the Best ! Who are we ? Thank you for visiting High Performance International's website. We have updated this website as of 4/07/08 to reflect our newest products. We will continue to upgrade the site so come back and check it out from time to time. High Performance has been building AR based target rifles for the past twenty five years. We are one of the most experienced builders available and we maintain the very highest quality standards. We are the best builder and supplier of special parts that you will find - and you will be pleased with the value received !!!! You can reach us at - High Performance International 5734 West Florist Ave. Milwaukee, WI 53218 Phone - 414-466-9040 E-mail - mike@hpirifles.com We will be happy to send you our catalog if you send us your mailing information. Thanks, mike bykowski E-mail us today ! New Product from HIGH PERFORMANCE INTERNATIONAL AR15 Side Charging Handle Upper A side charging handle system where the charging handle does NOT reciprocate with the bolt carrier. Nothing flying back and forth as the rifle cycles during firing. Nothing to unscrew or disassemble in order to remove the bolt and carrier for cleaning. No long side cuts to weaken the upper receiver. No interference with adjustable cheek piece. Easy bolt release with trigger hand. Available with either right or left-handed side charging handle. Available with either a dovetail or STANAG Mil spec 1913 top rail Match rifle upper features: * Enlarged ejection port. * 15 minute down slant on top rail for proper scope elevation zeroing at long range. * Extended top rail for proper forward scope mounting for prone shooting. * Clean sleek design. * Right and left-hand side ejection port models available.          *PATENT PENDING                     "End of Season Special" Price Right-handed match upper with extended dovetail rail List price $325.00  Offer extended !!!!!!!!! 20% off of orders placed before December 31 , 2007 Only $259.00 Includes modified carrier key STANAG MIL SPEC 1913 rail $25.00 extra (It simply takes more machine time) (Gunsmiths and Dealers - Quantity pricing available) Match rifle style upper Military type upper features: * A3 style raised rail. * Choice of left or right-side charging handle. * Choice of upper length or forward extended top rail. * Choice of a dovetail or STANAG Mil spec 1913 style rail. Military style upper New Cartridge Developments Watch for information on our new line of HPI-SPC cartridges                          6.5 HPI-SPC                          6.3 HPI-SPC   New data will be posted soon ! Watch for it!                     and more in this series      The point of this series is that they are all variations on the 6.8 Rem SPC parent brass with no special dies required - just use bushing dies with the appropriate size bushing - one set of dies for all calibers.      The 6.5 HPI-SPC has slightly more case capacity than the 6.5 Grendel and will give equal performance. And you have the choice of large or small rifle primers depending on whose brass you purchase. The cartridge has better proportions  for more reliable feeding and the simplicity of easily available brass and a standard die set. Just have us chamber your barrel in this caliber and enjoy the enhanced performance. We have some preliminary test data with a rifle with a 25 inch Broughton barrel             85 gr. Sierra         3225 fps            100gr. Sierra         2945 fps            107gr. Sierra            not tested expect 2800 fps            119gr. Cauterucio    not tested expect 2650 fps            120gr. Sierra           2645 fps            129gr. Cauterucio   2530 fps  Preliminary testing with the 20 inch Broughton barrel             85gr. Sierra            3108 fps            100gr. Sierra           2865fps            120gr. Sierra           2547fps            129gr. Cauterucio   2452fps        The 95gr. Hornady Vmax at mag length has a BC of .365 and a velocity of 3078 fps.    The 119gr. Cauterucio VLD at single load length has a BC of .595 and a velocity of 2700 fps.     Both loads showed excellent accuracy and this should be a winning combination in an AR-15 frame match rifle.     Our thanks to Jon Wilcox for being the sponsor of this caliber and sharing the financial risks of this project as well as helping to develop the computer generated projections prior to testing.      Good news!!!  Haig Derderian has come forward as the sponsor of the 6.3 HPI-SPC caliber project. Haig is a double distinguished in rifle and pistol and will now make his mark on the shooting world with a NRA match rifle. Watch here for the results of this project.   and also the               6.0 mm NBR-AL for the AR-10 rifles series      This cartridge is about a 1/4 inch longer than the 6 Norma BR and about a 1/4 inch shorter than the 243 Winchester - it is the best balance between 6mm performance and acceptable barrel life in a 6mm target rifle. Watch this site for more data as we test this cartridge.      Dr. Stefan Rose is the sponsor of this caliber project. Thank you Doc !!   All information is copyright protected - you must ask permission before using it for any purpose left-6.5 HPI-SPC right-6.3 HPI-SPC                                                                 Range Testing the 6.5 HPI-SPC .550 Group    As I sit here on December 2nd looking out at 12 inches of new snow I fondly remember the Friday after Thanksgiving. A beautiful fall day with temperatures of about 60 and almost no wind.    I got out to the range to do some load testing with the 6.5 HPI-SPC and 119 gr. Cauterucio bullets.     Everything in the spectrum of loadings that I had chosen shot very well – nice small round groups. I was also learning how to properly use the new front rest that I had gotten for my birthday. My technique improved as the afternoon progressed – but I still have a ways to go.     The best load produced the 5 shot group shown here - .550 inches center to center. I believe that we will be able to do even better than this as this 26 inch SS barrel further breaks in and my technique improves and we try more new loadings.     This test run was done with Remington brass and large rifle primers. We will repeat this series with Hornady brass and small rifle primers. Watch for the results.     If you do a Google web search of "Norma" the first entry you find will take you to Norma’s ballistic calculator.     The Winchester .308 cartridge with 168 gr. Sierra bullets has been a mainstay of the target shooting world for many years now.     Norma has a Diamond Line loading of this cartridge and you can find it in their rifle cartridges table.     You can get the ballistics of the 6.5 HPI-SPC by entering .595 BC and 119 gr. weight in the "define your own bullet" selection.     Elevation change from 200 yards to 600 yards is 15.75 minutes with the .308 but only 12.4 minutes with the 6.5 HPI-SPC.     10 mph wind drift at 600 yards is 35.0 inches with the .308 but only 24.4 inches with the 6.5 HPI-SPC.     This is a significant improvement over a time tested cartridge and along with shooting small round groups clearly demonstrates the usefulness of the 6.5 HPI-SPC in an AR-15 frame rifle.                         Hope you enjoyed this. mike bykowski